当1973年《濒危物种法案》签署时，人们期望它能保护一批引人注目的动物，如秃头鹰和黄石公园的北美灰熊。
When the Endangered Species Act was signed in 1973, it was expected to protect charismatic fauna such as the bald eagle and Yellowstone's grizzly bears.
驼鹿现今仍生活在新英格兰的偏远地区；不宜驯服的野牛仅在大草原的几块土地上生活；灰熊几乎绝迹；麋鹿的状况还不错，但是它们并算不上大型动物。
Moose stay in what remains of New England's wilds; undomesticated bison are restricted to a few great Plains patches; grizzly bear are practically gone; elk are - well, great, but they're not huge.
洛克韦尔说，造成这两种动物的栖息地重叠的原因有两个：一是灰熊从洛基山脉向东面和南面正在扩大它们的生存范围，结果使它们的数量不断增长。
The reason for the potential habitat overlap is twofold: grizzliesseem to be expanding their range east and south from the Rockies, mostly as a result of their growing population, says Rockwell.
报道说，此前，北极熊和灰熊曾在动物园内被配对成功，而且它们还生下了后代。 北极熊和灰熊这两种不同种类的熊，其繁殖期大致相同，但相比较而言，北极熊的繁殖期要比灰熊来得稍稍早一些。
Stirling said polar bears and grizzlies have been successfully paired in zoos and that their offspring are fertile, but there had been no documented case in the wild.
《承担71》约为野生动物保护的记录之间的一个真实故事2001- 2009年女性灰熊。
"Bear 71" is about from wildlife conservation track record between 2001-2009 the true story of a female grizzly bear.
动物父亲图片集：有没有规避它：雄灰熊做出坏的爸爸。
Photo Gallery: Animal Fathers There's no getting around it: Male grizzly bears make bad dads.
本系列将介绍凯西安德森的故事，他贡献一己之力保护野生动物，并以大胆的方式来瞭解北美灰熊的一举一动。
Expedition Wild presents the unique story of Casey Anderson, a man who has dedicated himself to wildlife preservation and a daring approach to understanding grizzlies every move.
一般说来，灰熊不是社交型动物。
一般说来，灰熊不是社交型动物。
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