单词：pronghorn antelope
单词：pronghorn antelope 相关文章
13,000 years ago, the ice age cheetah was the pronghorn's greatest enemy. And pronghorn would have needed all their amazing speed. The American cheetah was larger than its African cousin. But it had the same Achilles' heel. A cheetah's high-performan
探索与发现2012年
This mother bear's experience gives her family a good chance of survival until spring arrives. They will return again and again as the thaw releases more fish. On the warmer plains and valleys that surround the plateau, grazers are on the move. They
自然百科2012年
Every fall, this herd of pronghorn antelope treks more than 100 miles from Grand Teton National Park to their winter habitat in the Upper Green River Valley of Wyoming. This phenomenal migration, one of the longest in North America, has been taking p
自然百科2009年
By now the pronghorn have pushed further than any of Yellowstones animals, out of forests, through farmland and down into the wide prairies at the foot of the Rocky Mountains themselves. Their search for winter grazing takes them over a hundred miles
自然百科2012年
The Osage orange seeds were carried far across the plains, before being deposited, pre-packed in their fertilizer growbags, ready to take root. As the ice age waned, the milder climate and the mixed vegetation meant the plains were able to support a
探索与发现2012年
Highway Crossings Protect Migrating Pronghorns--and Motorists Ever hear of the pronghorn antelope in the American west? Well, its not really an antelopeits actually more closely related to giraffes than to true antelopes. And the last known migration
2018年科学美国人10月