Bears reproduce slowly , he says , so killing even a few could have large repercussions on the state 's population of black , brown and grizzly bears .
他说,熊繁殖很缓慢,所以即使只杀掉很少的熊都会对该州黑熊、棕熊和灰熊的数量产生很大的影响。
Grizzly bears have found this food source and scraps between the different bears have been witnessed .
灰熊已经发现这个食物来源,这里已经发现不同的熊的足迹。
Grizzly bears have not been considered particularly sociable in the past , but if others in glacier bay are seen combing themselves in this way that view might have to change .
When the explorers lewis and clark arrived in montana in 1805 they found more wildlife than they had seen in any other part of their journey ; elk , antelope , deer , beavers and grizzly bears .
The grizzly is currently listed as a threatened species , however the u. s. fish and wildlife service has announced that they intend to take it off the endangered species list for the yellowstone region but will likely keep it listed in areas where it has not yet recovered fully .
The great bear rainforest is home to hundreds of species , including cougars , wolves , salmon , grizzly bears , and the ' spirit ' bear , a unique subspecies of the black bear , in which one in 10 cubs displays a recessive white coloured coat
John craighead , now 95 , is legendary in the field of wildlife biology , famous with his twin brother , the late frank craighead , for pioneering studies of grizzly bears in yellowstone national park and for numerous articles and documentaries published by national geographic .