1 00:00:08,866 --> 00:00:11,700 {\an1}THURMAN: It's your first day in the world, 2 00:00:11,733 --> 00:00:15,200 {\an1}your first step into a vast 3 00:00:15,233 --> 00:00:16,966 {\an1}and daunting landscape... 4 00:00:20,033 --> 00:00:23,300 {\an1}...full of possibilities... 5 00:00:23,333 --> 00:00:26,033 wonder... 6 00:00:26,066 --> 00:00:27,533 and peril. 7 00:00:27,566 --> 00:00:30,000 [ Wind whistling ] 8 00:00:30,033 --> 00:00:34,200 You've just been born in the Rockies, 9 00:00:34,233 --> 00:00:39,300 an untamed wilderness in the heart of North America. 10 00:00:39,333 --> 00:00:42,166 {\an1}And you have much to learn. 11 00:00:42,200 --> 00:00:44,966 Each new challenge will test your resolve. 12 00:00:47,866 --> 00:00:50,833 Every new opportunity will hone your skills. 13 00:00:50,866 --> 00:00:56,366 {\an8}♪♪♪ 14 00:00:56,400 --> 00:00:58,566 You will need to grow up fast... 15 00:01:01,066 --> 00:01:02,633 {\an1}...if you hope to take on the Rockies' 16 00:01:02,666 --> 00:01:05,333 {\an1}most formidable challenge... 17 00:01:05,366 --> 00:01:08,166 {\an1}your very first winter. 18 00:01:11,033 --> 00:01:19,033 {\an8}♪♪♪ 19 00:01:21,000 --> 00:01:29,000 {\an8}♪♪♪ 20 00:01:50,666 --> 00:01:51,666 {\an8}[ Wind whistling ] 21 00:01:51,700 --> 00:01:54,533 {\an1}THURMAN: In the shadow of the Teton Range, 22 00:01:54,566 --> 00:01:57,366 {\an1}summer is drawing to a close. 23 00:02:11,733 --> 00:02:15,166 {\an1}And one grizzly mother and her four chubby cubs 24 00:02:15,200 --> 00:02:17,666 are making their way across the valley. 25 00:02:19,533 --> 00:02:21,766 It's remarkable for a mother grizzly 26 00:02:21,800 --> 00:02:25,633 {\an1}to still have four healthy cubs this late in the season. 27 00:02:28,100 --> 00:02:31,133 {\an1}But she's no ordinary mother. 28 00:02:31,166 --> 00:02:33,566 This is Grizzly 399, 29 00:02:33,600 --> 00:02:37,233 the matriarch of Grand Teton National Park. 30 00:02:40,266 --> 00:02:42,366 {\an1}Her cubs are playfully sparring with each other 31 00:02:42,400 --> 00:02:44,033 as they bound about. 32 00:02:46,766 --> 00:02:48,766 {\an1}But 399 is on a mission. 33 00:02:48,800 --> 00:02:55,800 {\an8}♪♪♪ 34 00:02:55,833 --> 00:02:59,533 {\an1}Her family is in a state of hyperphagia, 35 00:02:59,566 --> 00:03:02,266 driven by the need to fatten up for winter. 36 00:03:02,300 --> 00:03:08,033 {\an8}♪♪♪ 37 00:03:08,066 --> 00:03:13,800 {\an8}♪♪♪ 38 00:03:13,833 --> 00:03:16,800 {\an1}During this time, she can easily double her body weight. 39 00:03:16,833 --> 00:03:22,666 {\an8}♪♪♪ 40 00:03:22,700 --> 00:03:24,700 {\an1}Her cubs will pack it on, as well. 41 00:03:24,733 --> 00:03:26,966 {\an8}♪♪♪ 42 00:03:27,000 --> 00:03:30,633 {\an1}Even as they'll rely on mom's support for a few more years. 43 00:03:30,666 --> 00:03:37,166 {\an8}♪♪♪ 44 00:03:37,200 --> 00:03:39,066 {\an1}She huffs to collect her cubs 45 00:03:39,100 --> 00:03:41,866 {\an1}as she has done countless times in her life. 46 00:03:44,166 --> 00:03:48,100 {\an1}For 399 isn't just a mother, 47 00:03:48,133 --> 00:03:52,066 but a grandmother many times over. 48 00:03:52,100 --> 00:03:54,266 And at the age of 24, 49 00:03:54,300 --> 00:03:58,300 {\an1}she's one of the oldest living wild grizzlies we know of. 50 00:04:00,800 --> 00:04:02,633 And among the oldest wild creatures 51 00:04:02,666 --> 00:04:05,133 {\an1}to call the Rockies their home. 52 00:04:07,933 --> 00:04:11,833 {\an1}The Rocky Mountains stretch over 2,000 miles 53 00:04:11,866 --> 00:04:14,200 across North America. 54 00:04:18,533 --> 00:04:22,066 {\an1}Bringing together some of the most diverse and vital habitats 55 00:04:22,100 --> 00:04:23,733 on the continent. 56 00:04:26,966 --> 00:04:30,233 {\an1}And for every creature born in the Rockies, 57 00:04:30,266 --> 00:04:34,133 {\an1}this next crucial step of growing up has its own speed 58 00:04:34,166 --> 00:04:37,600 and path, filled with the unexpected. 59 00:04:41,266 --> 00:04:45,233 {\an1}But one thing is for certain, in just a few weeks, 60 00:04:45,266 --> 00:04:48,333 these strangely wild sanctuaries... 61 00:04:50,700 --> 00:04:53,833 {\an1}...will be plunged back into winter once again. 62 00:04:53,866 --> 00:05:01,866 {\an8}♪♪♪ 63 00:05:03,366 --> 00:05:11,366 {\an8}♪♪♪ 64 00:05:12,766 --> 00:05:14,633 {\an1}Across the Teton Range, 65 00:05:14,666 --> 00:05:18,600 {\an1}sandhill cranes have already begun the long journey south, 66 00:05:18,633 --> 00:05:21,033 {\an1}to their wintering grounds in New Mexico. 67 00:05:28,166 --> 00:05:31,066 {\an1}Riding thermals across high mountain passes, 68 00:05:31,100 --> 00:05:35,066 {\an1}cranes make their way across Colorado's Rocky Mountains. 69 00:05:37,900 --> 00:05:41,433 {\an1}Here, the Rockies reach their zenith with 58 peaks 70 00:05:41,466 --> 00:05:44,466 above 14,000 feet, 71 00:05:44,500 --> 00:05:48,266 {\an1}the tallest mountains in the entire stretch of the Rockies. 72 00:05:52,933 --> 00:05:55,166 {\an1}As the cranes continue south, 73 00:05:55,200 --> 00:06:01,200 {\an1}a magical transformation is unfolding beneath them. 74 00:06:01,233 --> 00:06:05,000 {\an1}Green hillsides are turning gold as vibrant autumn colors 75 00:06:05,033 --> 00:06:09,166 {\an1}wash across the Rockies like ocean waves. 76 00:06:09,200 --> 00:06:17,200 {\an8}♪♪♪ 77 00:06:18,600 --> 00:06:21,700 {\an1}Trees are preparing for the trials of winter 78 00:06:21,733 --> 00:06:23,866 {\an1}by entering a state of dormancy. 79 00:06:23,900 --> 00:06:31,900 {\an8}♪♪♪ 80 00:06:32,266 --> 00:06:40,266 {\an8}♪♪♪ 81 00:06:40,666 --> 00:06:43,666 {\an1}And many animals are preparing for the scarcity of food 82 00:06:43,700 --> 00:06:45,333 {\an1}that comes with winter. 83 00:06:48,966 --> 00:06:52,100 {\an1}Squirrels are plucking off the most promising pinecones 84 00:06:52,133 --> 00:06:55,300 {\an1}before they've dropped their seeds to the forest floor. 85 00:07:01,900 --> 00:07:04,666 {\an1}They will cache as many cones as they can 86 00:07:04,700 --> 00:07:06,600 {\an1}before snow covers the ground. 87 00:07:13,066 --> 00:07:16,966 And while many are preparing for winter, 88 00:07:17,000 --> 00:07:20,133 {\an1}bull elk have other things on their minds. 89 00:07:23,733 --> 00:07:28,633 It's mating season in Rocky Mountain National Park. 90 00:07:29,500 --> 00:07:32,966 Cows are preoccupied with their young and grazing 91 00:07:33,000 --> 00:07:34,833 {\an1}before the snows comes. 92 00:07:40,100 --> 00:07:43,333 [ Calling ] 93 00:07:43,366 --> 00:07:46,100 {\an1}But our bull is intent on holding the reins tight 94 00:07:46,133 --> 00:07:49,733 {\an1}on his harem of 20 or so cows. 95 00:07:49,766 --> 00:07:52,033 [ Calling ] 96 00:07:55,100 --> 00:07:58,133 {\an1}His bugle is a warning to other males, 97 00:07:58,166 --> 00:08:01,733 and it can be heard for miles around. 98 00:08:01,766 --> 00:08:05,300 It's a vocal display of dominance 99 00:08:05,333 --> 00:08:09,400 {\an1}meant to ward off rivals and attract mates. 100 00:08:10,366 --> 00:08:13,366 {\an1}There are plenty of other bulls out there, 101 00:08:13,400 --> 00:08:16,966 but so far, his strategy is working. 102 00:08:17,933 --> 00:08:20,000 [ Calling ] 103 00:08:24,866 --> 00:08:29,600 {\an1}This stretch of wilderness butts up to the city of Estes Park. 104 00:08:29,633 --> 00:08:32,633 So males will compete on the golf course 105 00:08:32,666 --> 00:08:35,466 while cows graze on the putting greens. 106 00:08:36,033 --> 00:08:38,400 [ Horns honking ] 107 00:08:38,433 --> 00:08:41,800 {\an1}But keeping ahold of your harem is hardly that easy. 108 00:08:42,600 --> 00:08:49,400 {\an8}♪♪♪ 109 00:08:49,433 --> 00:08:51,900 {\an1}While some animals learn to adapt to city life 110 00:08:51,933 --> 00:08:54,066 using stealth, 111 00:08:54,100 --> 00:08:58,000 {\an1}for a thousand-pound bull elk, it's more about brawn. 112 00:09:00,900 --> 00:09:03,300 [ Calling ] 113 00:09:06,666 --> 00:09:09,333 As the herd migrates through the city, 114 00:09:09,366 --> 00:09:13,600 {\an1}he'll spend more time corralling them away from traffic... 115 00:09:13,633 --> 00:09:15,266 {\an1}than from other males. 116 00:09:17,266 --> 00:09:19,100 [ Horn honking ] 117 00:09:19,133 --> 00:09:21,266 [ Elk calling ] 118 00:09:21,300 --> 00:09:24,266 {\an1}The bull has staked his claim to this intersection, 119 00:09:24,300 --> 00:09:27,233 and is trying hard to keep his harem in check. 120 00:09:27,266 --> 00:09:28,600 [ Horns honking ] 121 00:09:28,633 --> 00:09:36,633 {\an8}♪♪♪ 122 00:09:37,966 --> 00:09:40,733 {\an1}City dwellers everywhere understand the trade-offs 123 00:09:40,766 --> 00:09:43,033 of a lack of privacy. 124 00:09:44,833 --> 00:09:48,166 {\an1}But this group will stick through it together, 125 00:09:48,200 --> 00:09:51,566 {\an1}all in the name of love. 126 00:09:53,733 --> 00:09:58,133 {\an1}Roughly 85% of Colorado's population lives along 127 00:09:58,166 --> 00:10:00,700 the Eastern edge of the Rocky Mountains, 128 00:10:00,733 --> 00:10:05,800 {\an1}in some of the fastest growing cities in the nation. 129 00:10:05,833 --> 00:10:08,600 With increasingly fragmented habitat, 130 00:10:08,633 --> 00:10:12,800 {\an1}city parks have become the new home for some stealthy hunters. 131 00:10:23,700 --> 00:10:25,733 [ Barking ] 132 00:10:25,766 --> 00:10:29,633 {\an1}It may not be the most ideal place to make a living, 133 00:10:29,666 --> 00:10:31,666 {\an1}but there is opportunity here. 134 00:10:40,566 --> 00:10:46,000 {\an1}Hunting is a skill honed over time, one-part instinct, 135 00:10:46,033 --> 00:10:48,233 {\an1}two parts, experience. 136 00:10:55,866 --> 00:10:57,333 {\an1}But holding on to your dinner 137 00:10:57,366 --> 00:11:00,733 is just as important as the hunt itself. 138 00:11:02,800 --> 00:11:07,433 {\an1}And that's what makes growing up in the Rockies such a challenge 139 00:11:09,400 --> 00:11:13,333 {\an1}It's all about learning what it takes to survive, 140 00:11:13,366 --> 00:11:16,466 {\an1}and that's not just about catching your next meal. 141 00:11:21,033 --> 00:11:23,866 It's about learning the rules of your tribe... 142 00:11:23,900 --> 00:11:29,366 {\an8}♪♪♪ 143 00:11:29,400 --> 00:11:32,800 finding a mate... 144 00:11:32,833 --> 00:11:38,800 and ultimately, successfully raising your young. 145 00:11:38,833 --> 00:11:40,966 {\an1}And as winter approaches, 146 00:11:41,000 --> 00:11:45,700 all of those lessons come more sharply into focus. 147 00:11:46,833 --> 00:11:49,466 {\an1}Childhood is a journey. 148 00:11:52,300 --> 00:11:54,466 Sandhill cranes have finally arrived 149 00:11:54,500 --> 00:11:57,600 {\an1}to Colorado's San Luis Valley. 150 00:11:59,333 --> 00:12:00,966 {\an1}Fields of wheat and barley 151 00:12:01,000 --> 00:12:04,033 {\an1}have become an important source of food for the cranes, 152 00:12:04,066 --> 00:12:07,200 especially with an ever-dwindling wetlands. 153 00:12:10,666 --> 00:12:13,200 {\an1}This all you can eat buffet 154 00:12:13,233 --> 00:12:16,800 is the perfect time to socialize. 155 00:12:16,833 --> 00:12:19,033 For young ones, it's an opportunity 156 00:12:19,066 --> 00:12:21,933 {\an1}to practice your dance moves. 157 00:12:21,966 --> 00:12:25,166 {\an1}Sandhill cranes will spend years learning to dance 158 00:12:25,200 --> 00:12:30,100 before they're ready to choose a life-long partner. 159 00:12:30,133 --> 00:12:33,200 {\an1}But these days of plenty may not last. 160 00:12:41,666 --> 00:12:44,566 {\an1}Drought continues to plague the west. 161 00:12:47,633 --> 00:12:52,000 {\an1}And the fate of both cranes and farmers are linked. 162 00:12:56,433 --> 00:12:58,800 All life here depends on the snowpack 163 00:12:58,833 --> 00:13:01,266 that accumulates in the high mountain peaks 164 00:13:01,300 --> 00:13:04,000 {\an1}of the Southern Rockies. 165 00:13:04,033 --> 00:13:06,533 {\an1}But that snowpack is dwindling. 166 00:13:09,766 --> 00:13:11,600 {\an1}The sand dunes that lie at the base 167 00:13:11,633 --> 00:13:14,066 {\an1}of the Sangre De Cristo Mountains 168 00:13:14,100 --> 00:13:19,233 are a stark reminder of a much wetter past. 169 00:13:19,266 --> 00:13:23,066 {\an1}Sand from ancient lakes that once covered the valley, 170 00:13:23,100 --> 00:13:27,600 {\an1}now form the tallest sand dunes in North America. 171 00:13:27,633 --> 00:13:31,800 {\an1}Reaching over 740 feet above the desert floor. 172 00:13:31,833 --> 00:13:37,333 {\an8}♪♪♪ 173 00:13:37,366 --> 00:13:40,400 {\an1}It's an ocean of sand, 174 00:13:40,433 --> 00:13:43,566 shaped by the forces of wind and water. 175 00:13:45,833 --> 00:13:48,500 {\an1}This is an environment of extremes. 176 00:13:52,000 --> 00:13:57,166 {\an1}Surface temperatures can reach 150 degrees in summer 177 00:13:57,200 --> 00:14:01,366 and minus-25 degrees on a winter's night. 178 00:14:01,400 --> 00:14:07,766 {\an8}♪♪♪ 179 00:14:07,800 --> 00:14:14,166 {\an8}♪♪♪ 180 00:14:14,200 --> 00:14:17,533 And here, at the base of the dunes, 181 00:14:17,566 --> 00:14:21,033 one tiny creature is just beginning his day. 182 00:14:23,433 --> 00:14:25,300 It's a kangaroo rat. 183 00:14:32,200 --> 00:14:37,333 {\an1}Timid by nature, this nocturnal rodent hops like a kangaroo 184 00:14:37,366 --> 00:14:42,500 {\an1}and has the appearance of a rat, but he is neither. 185 00:14:42,533 --> 00:14:46,900 {\an1}He is, however, uniquely adapted to desert life. 186 00:14:46,933 --> 00:14:49,733 {\an1}And this young kangaroo rat is hunting for seeds 187 00:14:49,766 --> 00:14:53,066 {\an1}blown across the sand. 188 00:14:53,100 --> 00:14:54,833 {\an1}He's not eating the seeds, 189 00:14:54,866 --> 00:14:57,600 {\an1}but rather storing them in his cheek pouches, 190 00:14:57,633 --> 00:15:00,700 {\an1}and bringing them back to his burrow for safe keeping. 191 00:15:02,966 --> 00:15:06,100 {\an1}It's a complex burrow system with separate chambers 192 00:15:06,133 --> 00:15:10,133 for sleeping and others for storing food. 193 00:15:10,166 --> 00:15:13,233 {\an1}And this underground home is his castle, 194 00:15:13,266 --> 00:15:16,466 {\an1}which he'll vigorously defend from any intruder. 195 00:15:16,500 --> 00:15:22,600 {\an8}♪♪♪ 196 00:15:22,633 --> 00:15:27,633 {\an1}Our young kangaroo rat is back on the hunt for seed. 197 00:15:28,266 --> 00:15:32,000 {\an1}But his search takes him farther and farther from his home. 198 00:15:35,966 --> 00:15:39,933 And while he's away, his curious neighbor, 199 00:15:39,966 --> 00:15:43,566 {\an1}drawn by the smell of seeds, infiltrates his burrow. 200 00:15:48,500 --> 00:15:52,866 {\an1}Our young kangaroo rat finally returns from his foray. 201 00:15:52,900 --> 00:15:56,900 {\an1}He doesn't know it yet, but his neighbor is already inside. 202 00:15:56,933 --> 00:16:04,933 {\an8}♪♪♪ 203 00:16:05,400 --> 00:16:07,200 {\an1}He springs into action... 204 00:16:09,566 --> 00:16:12,400 {\an1}...chasing the intruder out of his burrow 205 00:16:12,433 --> 00:16:14,500 and into the night. 206 00:16:17,566 --> 00:16:20,866 {\an1}It's the end of a long night for our kangaroo rat, 207 00:16:20,900 --> 00:16:25,766 {\an1}but now he's safely tucked away inside his home. 208 00:16:26,600 --> 00:16:28,966 {\an1}As autumn comes to a close, 209 00:16:29,000 --> 00:16:33,533 the cranes begin the last leg of their journey. 210 00:16:33,566 --> 00:16:35,933 {\an1}They are following an ancient flight path 211 00:16:35,966 --> 00:16:39,533 {\an1}to their wintering grounds in New Mexico. 212 00:16:39,566 --> 00:16:43,400 {\an1}Sandhill cranes are as much a part of the Rockies 213 00:16:43,433 --> 00:16:46,433 {\an1}as the stones themselves. 214 00:16:46,466 --> 00:16:49,366 {\an1}Unearthly sandstone formations rise up 215 00:16:49,400 --> 00:16:53,833 {\an1}from the rolling badlands of New Mexico. 216 00:16:53,866 --> 00:16:56,400 The Navajo peoples call these pillars 217 00:16:56,433 --> 00:17:00,433 "De-Na-Zin", meaning "Standing Crane". 218 00:17:03,666 --> 00:17:06,600 A natural monument to the North America's most 219 00:17:06,633 --> 00:17:08,800 ancient bird. 220 00:17:08,833 --> 00:17:15,866 {\an8}♪♪♪ 221 00:17:15,900 --> 00:17:22,933 {\an8}♪♪♪ 222 00:17:22,966 --> 00:17:27,400 {\an1}In the Colorado Rockies, winter is getting a head start. 223 00:17:28,600 --> 00:17:30,433 {\an1}The first snow flurries of the season 224 00:17:30,466 --> 00:17:33,066 {\an1}leave behind a dusting of snow. 225 00:17:35,733 --> 00:17:39,066 {\an1}And by sunrise, the dunes have been transformed. 226 00:17:39,100 --> 00:17:46,800 {\an8}♪♪♪ 227 00:17:46,833 --> 00:17:54,533 {\an8}♪♪♪ 228 00:17:54,566 --> 00:17:58,500 {\an1}For bighorn sheep the end of autumn marks a turning point. 229 00:18:01,966 --> 00:18:04,100 And for lambs, it's their first introduction 230 00:18:04,133 --> 00:18:07,700 to a hallmark event, a time when they begin to see 231 00:18:07,733 --> 00:18:11,800 {\an1}what all this jockeying for position is really about. 232 00:18:13,833 --> 00:18:16,433 It's rutting season, and males are competing 233 00:18:16,466 --> 00:18:18,700 {\an1}for the right to mate. 234 00:18:19,866 --> 00:18:24,900 {\an1}Rank is constantly reinforced and often contested. 235 00:18:27,500 --> 00:18:29,733 {\an1}Their ultimate weapons are their curled horns 236 00:18:29,766 --> 00:18:33,900 {\an1}that can weigh up to 30 pounds. 237 00:18:33,933 --> 00:18:36,766 {\an1}They are literal battering rams. 238 00:18:39,900 --> 00:18:42,766 {\an1}In spring, 2-week-old ram lambs 239 00:18:42,800 --> 00:18:47,666 {\an1}will begin to butt heads in mock battles. 240 00:18:47,700 --> 00:18:50,166 {\an1}In the early development of a social order 241 00:18:50,200 --> 00:18:53,433 they will be part of for the rest of their lives. 242 00:18:56,733 --> 00:19:00,633 {\an1}Most of the year these rams live in bachelor groups 243 00:19:00,666 --> 00:19:03,966 {\an1}that adhere to a ridged hierarchy largely determined 244 00:19:04,000 --> 00:19:06,900 by age and size. 245 00:19:08,100 --> 00:19:10,600 {\an1}Their life has a singular focus, 246 00:19:10,633 --> 00:19:14,233 {\an1}and this is what they've been preparing for all year long. 247 00:19:17,866 --> 00:19:20,833 {\an1}A male can determine if a female is ready to mate, 248 00:19:20,866 --> 00:19:24,200 {\an1}simply by smelling her urine. 249 00:19:25,100 --> 00:19:30,066 {\an1}He takes in her scent by tilting his head back so her pheromones 250 00:19:30,100 --> 00:19:33,633 {\an1}can reach a sense organ in the roof of his mouth. 251 00:19:37,300 --> 00:19:40,633 Females are in estrus for just 48 hours. 252 00:19:40,666 --> 00:19:46,033 {\an8}♪♪♪ 253 00:19:46,066 --> 00:19:51,466 {\an1}And during this time, the rule book rams have lived by 254 00:19:51,500 --> 00:19:54,500 {\an1}is thrown out the window. 255 00:19:55,300 --> 00:19:58,466 A higher ranking male is guarding this female. 256 00:20:01,200 --> 00:20:04,000 But he's up against a reckless youngster 257 00:20:04,033 --> 00:20:05,666 {\an1}willing to risk it all. 258 00:20:05,700 --> 00:20:13,700 {\an8}♪♪♪ 259 00:20:15,233 --> 00:20:23,233 {\an8}♪♪♪ 260 00:20:24,766 --> 00:20:27,600 {\an1}The lower ranking male knows he can't win 261 00:20:27,633 --> 00:20:29,333 {\an1}in a head-to-head fight. 262 00:20:31,366 --> 00:20:33,766 {\an1}So his goal is to separate the female 263 00:20:33,800 --> 00:20:37,633 {\an1}from the higher ranking male 264 00:20:37,666 --> 00:20:40,500 {\an1}just long enough to mate. 265 00:20:41,633 --> 00:20:45,033 In these early years, it may be his only chance. 266 00:20:45,066 --> 00:20:52,133 {\an8}♪♪♪ 267 00:20:52,166 --> 00:20:59,233 {\an8}♪♪♪ 268 00:20:59,266 --> 00:21:06,400 {\an8}♪♪♪ 269 00:21:06,433 --> 00:21:11,600 {\an1}As the late autumn sun slowly begins to melt away the snow, 270 00:21:11,633 --> 00:21:13,566 {\an1}things are becoming heated. 271 00:21:13,600 --> 00:21:15,566 [ Horns crack ] 272 00:21:19,433 --> 00:21:21,900 {\an1}For most young, it's the closest they've been to 273 00:21:21,933 --> 00:21:25,033 so many large males. 274 00:21:25,066 --> 00:21:27,766 And for ram lambs, 275 00:21:27,800 --> 00:21:30,800 {\an1}it's a window into their future. 276 00:21:36,300 --> 00:21:38,533 [ Horns crack ] 277 00:21:41,966 --> 00:21:46,866 {\an1}Rams are tuned into every movement on this mountainside. 278 00:21:46,900 --> 00:21:48,466 [ Horns crack ] 279 00:21:48,500 --> 00:21:52,766 {\an1}A distant clash of horns will draw males from a mile away. 280 00:21:55,166 --> 00:21:57,700 [ Horns crack ] 281 00:22:03,733 --> 00:22:07,900 {\an1}Half a dozen males are now in pursuit of this female, 282 00:22:07,933 --> 00:22:11,866 {\an1}including the dominant ram. 283 00:22:11,900 --> 00:22:15,100 With this many males bearing down on her, 284 00:22:15,133 --> 00:22:17,366 she makes a break for the one place 285 00:22:17,400 --> 00:22:20,600 {\an1}that has always meant safety. 286 00:22:20,633 --> 00:22:22,266 The cliffside. 287 00:22:26,666 --> 00:22:30,733 {\an1}Here, she has the advantage. 288 00:22:30,766 --> 00:22:35,833 {\an1}But the rams are relentless, and weighing in at 300 pounds, 289 00:22:35,866 --> 00:22:37,500 dangerous. 290 00:22:52,400 --> 00:22:54,933 So, she makes a break for the open field, 291 00:22:54,966 --> 00:22:57,466 {\an1}in an attempt to shake them. 292 00:22:58,566 --> 00:23:01,100 {\an1}The males are following close behind, 293 00:23:01,133 --> 00:23:05,500 {\an1}knocking each other off course as they try and gain ground. 294 00:23:05,533 --> 00:23:08,200 {\an1}The dominant ram tries to keep the others at bay 295 00:23:08,233 --> 00:23:10,800 {\an1}while maintaining his lead. 296 00:23:18,600 --> 00:23:20,766 {\an1}But the competition is fierce. 297 00:23:25,866 --> 00:23:29,766 She's exhausted and surrounded once again. 298 00:23:34,600 --> 00:23:37,533 {\an1}She makes one last attempt to flee, 299 00:23:37,566 --> 00:23:40,233 but this youngster seizes an opening. 300 00:23:40,266 --> 00:23:48,266 {\an8}♪♪♪ 301 00:23:49,433 --> 00:23:52,200 In the end, it is the higher ranking males 302 00:23:52,233 --> 00:23:55,866 {\an1}that have the greatest success. 303 00:23:55,900 --> 00:23:59,200 Her offspring, will likely be from him. 304 00:23:59,233 --> 00:24:07,033 {\an8}♪♪♪ 305 00:24:07,066 --> 00:24:14,833 {\an8}♪♪♪ 306 00:24:14,866 --> 00:24:22,600 {\an8}♪♪♪ 307 00:24:22,633 --> 00:24:26,033 {\an1}The winter solstice marks the shortest day of the year 308 00:24:26,066 --> 00:24:28,100 and the official beginning of winter. 309 00:24:28,133 --> 00:24:33,366 {\an8}♪♪♪ 310 00:24:33,400 --> 00:24:38,666 {\an8}♪♪♪ 311 00:24:38,700 --> 00:24:40,900 But across most of the Northern Rockies, 312 00:24:40,933 --> 00:24:44,066 {\an1}winter is well underway. 313 00:24:44,100 --> 00:24:50,466 {\an8}♪♪♪ 314 00:24:50,500 --> 00:24:56,900 {\an8}♪♪♪ 315 00:24:56,933 --> 00:24:59,866 {\an1}A deep freeze has settled in, 316 00:24:59,900 --> 00:25:02,833 {\an1}and it's here to stay. 317 00:25:05,133 --> 00:25:08,433 [ Wind whistling ] 318 00:25:08,466 --> 00:25:10,000 The first big storm of the season 319 00:25:10,033 --> 00:25:12,400 is building over Yellowstone Valley. 320 00:25:25,566 --> 00:25:29,700 {\an1}Our bison herd is heading across their range, into the storm. 321 00:25:31,933 --> 00:25:35,800 Bison, unlike cattle, face storms head on, 322 00:25:35,833 --> 00:25:39,733 {\an1}knowing they will pass through it quicker. 323 00:25:39,766 --> 00:25:43,900 {\an1}But that doesn't make winter any less brutal. 324 00:25:43,933 --> 00:25:47,633 {\an1}The Rockies are clearly living up to their reputation. 325 00:25:54,766 --> 00:25:57,966 It's our young calf's first winter, 326 00:25:58,000 --> 00:26:00,600 and he already seems out of his depth 327 00:26:00,633 --> 00:26:02,933 as he struggles to keep up with mom. 328 00:26:10,333 --> 00:26:12,566 {\an1}It's a serious time of year, 329 00:26:12,600 --> 00:26:16,833 {\an1}and mom is completely focused on the task at hand, 330 00:26:16,866 --> 00:26:19,866 {\an1}using her head like a plow to uncover grasses 331 00:26:19,900 --> 00:26:22,933 beneath the snow. 332 00:26:22,966 --> 00:26:26,500 {\an1}But the storm is making that task more difficult, 333 00:26:26,533 --> 00:26:29,533 burying the grasses the minute she's uncovered them. 334 00:26:32,300 --> 00:26:35,966 {\an1}She'll need every morsel she can dig up. 335 00:26:36,000 --> 00:26:38,266 {\an1}She's not only nursing the calf, 336 00:26:38,300 --> 00:26:42,633 {\an1}but like many of the females in the herd, she's also pregnant. 337 00:26:48,533 --> 00:26:50,466 The calf is learning, 338 00:26:50,500 --> 00:26:53,766 {\an1}but he still lacks the broad head needed to plow snow, 339 00:26:53,800 --> 00:26:57,833 {\an1}so he relies on the adults to help unearth grasses. 340 00:27:01,500 --> 00:27:05,933 {\an1}As difficult as his first winter may be, 341 00:27:05,966 --> 00:27:08,466 he is not alone 342 00:27:08,500 --> 00:27:11,766 {\an1}and will rely on the strength of the herd to support him. 343 00:27:19,200 --> 00:27:22,133 {\an1}Others must endure winter on their own. 344 00:27:30,066 --> 00:27:33,866 It's this young fox's first winter, 345 00:27:33,900 --> 00:27:36,566 {\an1}and it's already proven to be a difficult one. 346 00:27:40,566 --> 00:27:45,066 {\an1}Foxes must grow up fast, from childhood to adulthood 347 00:27:45,100 --> 00:27:47,533 {\an1}in the span of just six months. 348 00:27:47,566 --> 00:27:55,566 {\an8}♪♪♪ 349 00:27:55,866 --> 00:28:03,866 {\an8}♪♪♪ 350 00:28:04,233 --> 00:28:07,600 {\an1}His winter coat will keep him warm enough in the storm, 351 00:28:07,633 --> 00:28:09,600 {\an1}but it won't keep him fed. 352 00:28:12,900 --> 00:28:17,433 {\an1}Foxes use their ears to detect their prey under the snow. 353 00:28:18,433 --> 00:28:21,600 {\an1}But now, with the storm bearing down on him, 354 00:28:21,633 --> 00:28:24,066 {\an1}that's become impossible. 355 00:28:24,100 --> 00:28:30,600 {\an8}♪♪♪ 356 00:28:30,633 --> 00:28:34,700 {\an1}He seems unwilling to give up just yet. 357 00:28:34,733 --> 00:28:36,933 But conditions are getting worse. 358 00:28:40,233 --> 00:28:42,900 {\an1}Every minute he spends stalking prey in the storm 359 00:28:42,933 --> 00:28:45,066 is energy spent. 360 00:28:45,100 --> 00:28:47,666 {\an1}It's a costly endeavor. 361 00:28:47,700 --> 00:28:53,266 {\an8}♪♪♪ 362 00:28:53,300 --> 00:28:57,466 {\an1}Finally, the fox decides to give up the hunt. 363 00:28:57,500 --> 00:29:05,200 {\an8}♪♪♪ 364 00:29:05,233 --> 00:29:12,866 {\an8}♪♪♪ 365 00:29:12,900 --> 00:29:15,000 {\an1}The morning only brings more snow, 366 00:29:15,033 --> 00:29:17,933 {\an1}and now our herd is buried. 367 00:29:17,966 --> 00:29:24,766 {\an8}♪♪♪ 368 00:29:25,866 --> 00:29:29,033 [ Wind whistling ] 369 00:29:35,066 --> 00:29:38,933 {\an1}December is among the coldest months in Yellowstone, 370 00:29:38,966 --> 00:29:42,366 {\an1}with average temperatures lingering well below freezing. 371 00:29:46,200 --> 00:29:49,033 {\an1}Bison are built for the cold. 372 00:29:49,066 --> 00:29:53,066 {\an1}Their winter coat is so thick, snow accumulates on their back 373 00:29:53,100 --> 00:29:56,433 without melting away. 374 00:29:56,466 --> 00:30:03,833 {\an8}♪♪♪ 375 00:30:03,866 --> 00:30:08,333 Once the skies clear, temperatures plummet. 376 00:30:08,733 --> 00:30:11,133 {\an1}It's so cold that water vapor 377 00:30:11,166 --> 00:30:14,500 begins to crystalize in the air, 378 00:30:14,533 --> 00:30:19,500 {\an1}creating a magical phenomenon known as Diamond Dust. 379 00:30:19,533 --> 00:30:27,533 {\an8}♪♪♪ 380 00:30:29,433 --> 00:30:37,433 {\an8}♪♪♪ 381 00:30:39,366 --> 00:30:47,366 {\an8}♪♪♪ 382 00:30:49,266 --> 00:30:52,900 {\an1}As we enter the frigid depths of winter, 383 00:30:52,933 --> 00:30:55,500 the landscape appears eerily barren. 384 00:30:58,066 --> 00:31:02,000 {\an1}Most bears would have been denned up long ago, 385 00:31:02,033 --> 00:31:04,600 {\an1}but in the shadow of the Tetons, 386 00:31:04,633 --> 00:31:08,800 one legend has yet to call it quits. 387 00:31:08,833 --> 00:31:12,766 Grizzly 399 and her four chubby cubs 388 00:31:12,800 --> 00:31:17,166 {\an1}are wading through the deep snow in the final days of December. 389 00:31:20,533 --> 00:31:22,700 It's incredibly late in the season for any bear 390 00:31:22,733 --> 00:31:25,166 to still be out, 391 00:31:25,200 --> 00:31:28,133 especially a mother with four cubs. 392 00:31:28,166 --> 00:31:36,166 {\an8}♪♪♪ 393 00:31:37,000 --> 00:31:39,066 {\an1}But if anyone was going to redefine 394 00:31:39,100 --> 00:31:42,233 what it means to be a grizzly, 395 00:31:42,266 --> 00:31:45,866 it would be 399. 396 00:31:45,900 --> 00:31:50,466 {\an1}She has beaten all the odds and charted her own path. 397 00:31:54,400 --> 00:32:00,000 399 is the undisputed Queen of the Tetons. 398 00:32:01,300 --> 00:32:04,266 And who, after all, would be foolish enough 399 00:32:04,300 --> 00:32:07,600 {\an1}to question a Queen's decision. 400 00:32:07,633 --> 00:32:12,500 {\an8}♪♪♪ 401 00:32:12,533 --> 00:32:15,766 {\an1}She pauses to take one last look over her domain. 402 00:32:18,833 --> 00:32:21,200 Now she's ready. 403 00:32:21,233 --> 00:32:24,300 {\an1}399 makes her way up slope. 404 00:32:24,333 --> 00:32:27,900 {\an1}She's heading to her winter den. 405 00:32:29,533 --> 00:32:33,766 {\an1}Somewhere in the vastness of the Teton range. 406 00:32:33,800 --> 00:32:39,500 {\an8}♪♪♪ 407 00:32:39,533 --> 00:32:45,233 {\an8}♪♪♪ 408 00:32:45,266 --> 00:32:49,233 Farther north, in the depths of Yellowstone, 409 00:32:49,266 --> 00:32:51,833 {\an1}our bison family has sought refuge from the storm 410 00:32:51,866 --> 00:32:53,700 {\an1}among the thermal vents. 411 00:33:00,966 --> 00:33:03,766 {\an1}It's a welcome reprieve for the herd, 412 00:33:03,800 --> 00:33:05,966 {\an1}especially our young bison. 413 00:33:09,533 --> 00:33:12,300 {\an1}These hot springs not only provide warmth, 414 00:33:12,333 --> 00:33:16,100 but less snow cover and easier forage. 415 00:33:16,133 --> 00:33:18,233 {\an1}An important bit of knowledge 416 00:33:18,266 --> 00:33:20,966 when you weigh in at 2,000 pounds 417 00:33:21,000 --> 00:33:24,200 and subsist almost entirely on grasses. 418 00:33:30,333 --> 00:33:34,066 {\an1}Little by little, he's absorbing an ancient reservoir 419 00:33:34,100 --> 00:33:38,833 {\an1}of knowledge passed down from generation to generation. 420 00:33:47,433 --> 00:33:51,466 For predators, winter brings opportunity. 421 00:33:55,200 --> 00:33:57,566 [ Howling ] 422 00:33:57,600 --> 00:34:00,933 Coyotes evolved alongside wolves. 423 00:34:02,433 --> 00:34:04,566 [ Howling ] 424 00:34:07,133 --> 00:34:09,600 {\an1}And their canid cousin helped shaped them 425 00:34:09,633 --> 00:34:12,433 {\an1}into the highly flexible predator we know today. 426 00:34:20,900 --> 00:34:24,133 [ Crows cawing ] 427 00:34:28,700 --> 00:34:33,400 {\an1}A pack of coyotes has discovered the remains of a bison carcass. 428 00:34:33,433 --> 00:34:36,100 {\an1}And they are picking the meat clean from the bones. 429 00:34:42,500 --> 00:34:47,033 {\an1}During these cold winter months, competition is fierce. 430 00:34:48,633 --> 00:34:51,500 [ Screeching ] 431 00:34:57,233 --> 00:35:01,866 And any meal is meal worth defending. 432 00:35:01,900 --> 00:35:04,666 [ Snarling ] 433 00:35:29,733 --> 00:35:33,166 [ Wind whistling ] 434 00:35:38,100 --> 00:35:41,833 {\an1}But perhaps the deadliest predator of all 435 00:35:41,866 --> 00:35:43,800 is winter itself. 436 00:35:52,833 --> 00:35:54,700 {\an1}A casualty of the most recent storm 437 00:35:54,733 --> 00:35:57,833 has now become a feast for eagles. 438 00:35:57,866 --> 00:36:00,500 [ Screeching ] 439 00:36:18,266 --> 00:36:21,166 While eagles may rule the carcass by day... 440 00:36:25,500 --> 00:36:28,400 the night belongs to other predators. 441 00:36:28,433 --> 00:36:34,033 {\an8}♪♪♪ 442 00:36:34,066 --> 00:36:39,700 {\an8}♪♪♪ 443 00:36:39,733 --> 00:36:42,500 {\an1}A mountain lion has discovered the carcass. 444 00:36:47,133 --> 00:36:50,233 {\an1}And it's not just one... 445 00:36:50,266 --> 00:36:52,300 it's a family. 446 00:36:52,333 --> 00:36:55,433 {\an8}♪♪♪ 447 00:36:55,466 --> 00:36:57,666 [ Growling ] 448 00:37:01,033 --> 00:37:04,266 {\an1}Mom settles down for a meal. 449 00:37:04,300 --> 00:37:07,966 {\an1}At about 6 years of age, she's in the prime of her life. 450 00:37:11,433 --> 00:37:16,900 {\an1}Her kittens are fully grown now and the same size as mom. 451 00:37:16,933 --> 00:37:19,166 One of the kittens attempts to join her. 452 00:37:21,633 --> 00:37:24,633 {\an1}But mother is reluctant to share the carcass. 453 00:37:29,166 --> 00:37:33,033 But, as always, persistence pays off. 454 00:37:36,300 --> 00:37:41,200 {\an1}This will likely be the kittens last winter travelling with mom. 455 00:37:41,233 --> 00:37:45,333 {\an1}By spring, they will be on their own. 456 00:37:45,366 --> 00:37:47,666 {\an1}There's not much to this meal, 457 00:37:47,700 --> 00:37:50,633 especially for three grown lions. 458 00:37:50,666 --> 00:37:56,200 {\an8}♪♪♪ 459 00:37:56,233 --> 00:37:59,133 They try to drag the carcass away, 460 00:37:59,166 --> 00:38:03,166 but end up in a game of tug of war. 461 00:38:03,200 --> 00:38:07,133 {\an1}This thin strip of hide is not much of a prize. 462 00:38:07,166 --> 00:38:10,600 {\an8}♪♪♪ 463 00:38:10,633 --> 00:38:12,766 [ Wind whistling ] 464 00:38:15,666 --> 00:38:23,666 {\an8}♪♪♪ 465 00:38:28,500 --> 00:38:32,366 Our young fox is back on the hunt. 466 00:38:32,400 --> 00:38:35,000 And this time, the weather is on his side. 467 00:38:42,733 --> 00:38:45,066 He learned the basics of stalking and pouncing 468 00:38:45,100 --> 00:38:47,433 {\an1}when he was just a pup. 469 00:38:51,833 --> 00:38:56,666 {\an1}But the real trick to this hunt is finding your prey. 470 00:38:56,700 --> 00:39:00,000 {\an1}How do you hunt an animal you cannot see? 471 00:39:04,000 --> 00:39:07,733 {\an1}The fox's quarry lies deep under the snow. 472 00:39:07,766 --> 00:39:09,400 It's a meadow vole. 473 00:39:11,933 --> 00:39:14,733 And this snow cave is it's igloo. 474 00:39:17,166 --> 00:39:19,533 The snow forms an insulating layer, 475 00:39:19,566 --> 00:39:22,266 {\an1}protecting the vole from the harshest winter weather 476 00:39:22,300 --> 00:39:24,833 and keeping him safe from predators. 477 00:39:27,133 --> 00:39:29,333 Well, almost. 478 00:39:29,366 --> 00:39:35,233 {\an8}♪♪♪ 479 00:39:35,266 --> 00:39:37,566 {\an1}Although he may lack experience, 480 00:39:37,600 --> 00:39:42,100 this fox has all the tools he needs. 481 00:39:42,133 --> 00:39:44,233 {\an1}Foxes have incredible hearing 482 00:39:44,266 --> 00:39:48,500 {\an1}and can detect prey under more than 3 feet of snow. 483 00:39:52,066 --> 00:39:55,366 The tiniest movement can set the fox in motion. 484 00:39:55,400 --> 00:40:02,400 {\an8}♪♪♪ 485 00:40:02,433 --> 00:40:05,300 {\an1}He's located the vole. 486 00:40:05,333 --> 00:40:07,933 {\an1}And with a pounce, he strikes. 487 00:40:17,966 --> 00:40:20,333 A miss. 488 00:40:20,366 --> 00:40:22,766 This technique is called mousing, 489 00:40:22,800 --> 00:40:25,766 {\an1}and it's something foxes are supremely good at. 490 00:40:28,000 --> 00:40:30,366 {\an1}The rest is just practice. 491 00:40:36,600 --> 00:40:40,766 {\an1}But there's far more going on here than meets the eye. 492 00:40:46,400 --> 00:40:54,400 {\an8}♪♪♪ 493 00:40:56,400 --> 00:41:04,400 {\an8}♪♪♪ 494 00:41:06,466 --> 00:41:10,666 {\an1}It's believed that foxes can see magnetic north. 495 00:41:10,700 --> 00:41:17,000 {\an8}♪♪♪ 496 00:41:17,033 --> 00:41:21,500 {\an1}And by aligning their prey in a northward direction, 497 00:41:21,533 --> 00:41:24,733 along with the sound of the prey... 498 00:41:24,766 --> 00:41:30,500 {\an8}♪♪♪ 499 00:41:30,533 --> 00:41:34,100 {\an1}...they can triangulate the precise distance 500 00:41:34,133 --> 00:41:35,766 of their attack. 501 00:41:38,100 --> 00:41:43,400 {\an8}♪♪♪ 502 00:41:43,433 --> 00:41:48,766 {\an8}♪♪♪ 503 00:42:03,066 --> 00:42:05,433 {\an1}He's off to a good start, 504 00:42:05,466 --> 00:42:09,366 {\an1}but he'll need more than a single vole to keep him fed. 505 00:42:15,900 --> 00:42:20,233 {\an1}It's just before dawn in Western Montana's Bitterroot Valley. 506 00:42:22,833 --> 00:42:26,366 {\an1}A lioness is taking a familiar path through the forest. 507 00:42:28,700 --> 00:42:31,833 {\an1}But she's not on the hunt. 508 00:42:31,866 --> 00:42:34,033 {\an1}She's already caught her quarry, 509 00:42:34,066 --> 00:42:38,000 {\an1}and managed to take down a cow elk and her calf. 510 00:42:38,900 --> 00:42:42,200 {\an1}A meal that should last her several weeks. 511 00:42:54,333 --> 00:42:58,000 {\an1}The lioness has covered her kill in a pile of sticks and grass 512 00:42:58,033 --> 00:43:00,766 {\an1}to conceal it from scavengers. 513 00:43:03,400 --> 00:43:06,966 And there are plenty lurking in this forest. 514 00:43:09,433 --> 00:43:12,466 A pine martin eagerly awaits his turn. 515 00:43:16,700 --> 00:43:20,800 {\an1}The lioness has had her fill for the day, 516 00:43:20,833 --> 00:43:24,066 {\an1}but she'll return soon enough. 517 00:43:40,133 --> 00:43:43,466 [ Howling ] 518 00:43:45,600 --> 00:43:48,633 {\an1}Night envelops the forest. 519 00:43:51,300 --> 00:43:53,533 {\an1}A fox has discovered the kill. 520 00:43:56,100 --> 00:43:58,466 A carcass like this a pretty big score 521 00:43:58,500 --> 00:44:01,433 {\an1}when you've been subsisting on tiny rodents. 522 00:44:04,333 --> 00:44:06,600 {\an1}[ Twig snaps in distance ] 523 00:44:15,266 --> 00:44:18,333 A young mountain lion has discovered the carcass. 524 00:44:20,666 --> 00:44:23,300 It's her first winter on her own, 525 00:44:23,333 --> 00:44:25,500 {\an1}and this is a welcome meal. 526 00:44:37,833 --> 00:44:40,100 {\an1}But now the owner has returned. 527 00:44:55,300 --> 00:44:58,133 {\an1}Yet instead of chasing her off, 528 00:44:58,166 --> 00:45:01,100 {\an1}the older lion shares the kill with the youngster. 529 00:45:04,266 --> 00:45:07,466 {\an1}These two lions are only distantly related, 530 00:45:07,500 --> 00:45:10,366 yet the older female tolerates this youngster. 531 00:45:13,366 --> 00:45:15,533 This kind of resource sharing was once thought 532 00:45:15,566 --> 00:45:19,300 {\an1}improbable among solitary predators like mountain lions. 533 00:45:25,233 --> 00:45:28,066 But now it seems these solitary cats 534 00:45:28,100 --> 00:45:31,633 are far more social than previously imagined. 535 00:45:31,666 --> 00:45:39,666 {\an8}♪♪♪ 536 00:45:40,266 --> 00:45:42,633 [ Hooting ] 537 00:45:42,666 --> 00:45:46,933 {\an8}♪♪♪ 538 00:45:46,966 --> 00:45:49,733 {\an1}Over the coming weeks, the young lion returns 539 00:45:49,766 --> 00:45:52,366 {\an1}to these kills again and again. 540 00:45:55,366 --> 00:45:57,100 {\an1}This freezer full of meat 541 00:45:57,133 --> 00:46:00,200 has proven to be a vital source of food 542 00:46:00,233 --> 00:46:03,433 {\an1}and will help this young lioness get through the winter. 543 00:46:06,366 --> 00:46:10,966 {\an1}And because of this experience, our young lioness is far more 544 00:46:11,000 --> 00:46:14,066 {\an1}likely to share one of her own kills in the future. 545 00:46:20,866 --> 00:46:25,100 {\an1}With the last big storm of winter now upon her... 546 00:46:25,133 --> 00:46:29,433 {\an1}snow is quickly burying the carcass. 547 00:46:29,466 --> 00:46:31,800 But she is reluctant to concede her meal 548 00:46:31,833 --> 00:46:35,600 {\an1}in the middle of this storm. 549 00:46:35,633 --> 00:46:41,633 {\an8}♪♪♪ 550 00:46:41,666 --> 00:46:47,666 {\an8}♪♪♪ 551 00:46:47,700 --> 00:46:50,866 {\an1}This young lioness is lucky. 552 00:46:50,900 --> 00:46:53,166 She has made her home in a protected area 553 00:46:53,200 --> 00:46:54,866 of Western Montana, 554 00:46:54,900 --> 00:46:58,433 free from development and safe from hunting. 555 00:47:01,266 --> 00:47:04,233 {\an1}This land, once a working ranch, 556 00:47:04,266 --> 00:47:06,366 has now been returned to the wild. 557 00:47:10,766 --> 00:47:12,466 {\an1}And this kind of re-wilding 558 00:47:12,500 --> 00:47:15,133 is happening across Western Montana. 559 00:47:15,166 --> 00:47:23,166 {\an8}♪♪♪ 560 00:47:24,866 --> 00:47:29,166 {\an1}After decades of logging, forests, now protected, 561 00:47:29,200 --> 00:47:33,066 {\an1}have become home to lynx... 562 00:47:33,100 --> 00:47:35,333 and wolverine. 563 00:47:35,366 --> 00:47:43,366 {\an8}♪♪♪ 564 00:47:44,133 --> 00:47:52,133 {\an8}♪♪♪ 565 00:47:52,866 --> 00:48:00,866 {\an8}♪♪♪ 566 00:48:01,700 --> 00:48:04,766 {\an1}The last days of winter have finally arrived. 567 00:48:08,866 --> 00:48:12,300 {\an1}Rivers and lakes once again flow free. 568 00:48:12,333 --> 00:48:17,566 {\an8}♪♪♪ 569 00:48:17,600 --> 00:48:22,833 {\an8}♪♪♪ 570 00:48:22,866 --> 00:48:25,500 With the return of warm sunny days, 571 00:48:25,533 --> 00:48:28,100 {\an1}western painted turtles clamber 572 00:48:28,133 --> 00:48:31,433 to sun themselves on floating logs. 573 00:48:33,966 --> 00:48:35,633 {\an1}And a family of bears, 574 00:48:35,666 --> 00:48:37,866 {\an1}escaping from the heat of the day, 575 00:48:37,900 --> 00:48:41,800 cool off in their favorite swimming hole. 576 00:48:45,866 --> 00:48:50,100 {\an1}Many of the families that now call this forest home are drawn 577 00:48:50,133 --> 00:48:54,733 by the opportunities this restored habitat provides. 578 00:48:54,766 --> 00:49:02,766 {\an8}♪♪♪ 579 00:49:04,233 --> 00:49:08,733 {\an1}And it appears our lone fox has found a mate 580 00:49:08,766 --> 00:49:12,166 {\an1}and now has a thriving family of his own. 581 00:49:12,200 --> 00:49:19,000 {\an8}♪♪♪ 582 00:49:19,033 --> 00:49:20,933 [ Birds calling ] 583 00:49:20,966 --> 00:49:23,833 Across the Rockies, new families are taking 584 00:49:23,866 --> 00:49:27,766 {\an1}their first tentative steps into the world. 585 00:49:46,866 --> 00:49:50,066 And in the heart of Grand Teton National Park, 586 00:49:50,100 --> 00:49:52,533 {\an1}crowds gather in anticipation 587 00:49:52,566 --> 00:49:55,300 of the Rockies' most famous bear. 588 00:50:00,633 --> 00:50:03,400 Everyone is holding their breath. 589 00:50:03,433 --> 00:50:08,000 {\an8}♪♪♪ 590 00:50:08,033 --> 00:50:11,333 And they don't have long to wait. 591 00:50:11,366 --> 00:50:15,333 {\an8}♪♪♪ 592 00:50:15,366 --> 00:50:17,733 {\an1}[ Camera shutter clicks ] 593 00:50:17,766 --> 00:50:22,600 {\an1}This remarkable bear has defied the odds once again 594 00:50:22,633 --> 00:50:26,533 {\an1}and triumphantly wades out into a sea of adoring fans 595 00:50:26,566 --> 00:50:29,066 with all four cubs. 596 00:50:29,100 --> 00:50:31,833 {\an1}[ Camera shutters clicking ] 597 00:50:35,633 --> 00:50:39,400 {\an1}399 has made their home in the northern portion 598 00:50:39,433 --> 00:50:41,733 {\an1}of Grand Teton National Park. 599 00:50:45,033 --> 00:50:49,533 {\an1}And spends much of the spring close to the road. 600 00:50:50,100 --> 00:50:54,966 {\an1}It's one reason why this family has become so famous. 601 00:50:55,000 --> 00:50:57,800 {\an1}But that's not the only reason. 602 00:50:57,833 --> 00:50:59,533 At least 22 grizzlies 603 00:50:59,566 --> 00:51:04,033 {\an1}are the direct descendants of 399. 604 00:51:04,066 --> 00:51:09,200 {\an1}And the fact that they are here at all is remarkable in itself. 605 00:51:10,366 --> 00:51:14,533 {\an1}Just decades ago, there were fewer than 1,000 grizzlies 606 00:51:14,566 --> 00:51:20,733 {\an1}left in the lower 48, in just 2% of their former range. 607 00:51:21,466 --> 00:51:24,733 {\an1}Today, thanks to grizzly bear recovery efforts, 608 00:51:24,766 --> 00:51:27,433 those numbers have more than doubled. 609 00:51:30,066 --> 00:51:36,200 {\an8}♪♪♪ 610 00:51:36,233 --> 00:51:42,333 {\an8}♪♪♪ 611 00:51:42,366 --> 00:51:46,366 {\an1}399 has become a symbol of grizzly bear recovery. 612 00:51:49,233 --> 00:51:51,533 {\an1}And shows us what is possible 613 00:51:51,566 --> 00:51:55,533 {\an1}when we provide the minimal protection for wildlife. 614 00:52:00,000 --> 00:52:02,600 And it provides a glimmer of hope 615 00:52:02,633 --> 00:52:06,166 {\an1}that we can undo some of the damage we have done. 616 00:52:08,300 --> 00:52:11,233 {\an1}We can provide a safe home 617 00:52:11,266 --> 00:52:14,533 for all our Rocky Mountain families. 618 00:52:14,566 --> 00:52:22,566 {\an8}♪♪♪ 619 00:52:25,333 --> 00:52:33,333 {\an8}♪♪♪ 620 00:52:33,433 --> 00:52:41,433 {\an8}♪♪♪ 621 00:52:41,533 --> 00:52:49,533 {\an8}♪♪♪ 622 00:52:49,633 --> 00:52:57,633 {\an8}♪♪♪ 623 00:52:57,733 --> 00:52:59,733 {\an8}To learn more about what you've seen 624 00:52:59,766 --> 00:53:01,366 {\an7}on this "Nature" program, 625 00:53:01,400 --> 00:53:03,566 {\an8}visit pbs.org. 626 00:53:03,600 --> 00:53:11,600 {\an8}♪♪♪