Barred owls are a large species native to eastern North America, but they began moving west at the start of the 20th century. In parts of the Pacific Northwest, barred owls are now causing a drop in the population of a kind of smaller and less aggressive(侵略性的) bird: the northern ...
TRANSMITTERS ON OWLS IN NORTHWEST BLAMED FOR THEIR HIGH DEATH RATE
根据第二段中"InpartsofthePacificNorthwest,theowlsarenowbelievedtobecausing a dropinthepopulationof a smaller,lessaggressivebird:thenorthernspottedowl.Inmanyways,thebarredowlisthespottedowl'sworstenemy.(据信,在太平洋西北部的部分地区,这种猫头鹰导致了一种较小的、攻击性较弱的鸟类---北方斑点猫头鹰的数量...
In the Pacific Northwest there is a kind of owl (猫头鹰) that serves as a unique piece to the Northwest habitat (栖息地) — the northern spotted owl. Northern spotted owls are known to be curious. When seeing you, these owls will come down close and check you out. ...
for the northern spotted owl (Strix occidentalis caurina) is largely driven by metapopulation models or individually-based models that assume the success of juvenile dispersal in a fragmented landscape is a primary factor determining the future existence of spotted owls in the Pacific Northwest. We...
By 1973, large numbers of barred owls had arrived in the western state of Washington. Later theymoved south into Oregon and Caifornia.Inparts of the Pacific Northwest, the owls ae now beleved to be cauing a drop in the population of a smaller,less aggressive bird: the northerm spotted ...
The spotted owl of the Pacific Northwest has been in decline for decades as old growth forests disappear. It was rejected for an immediate upgrade to “endangered” status last year despite losing nearly 4% of its population annually. Also included in the lawsuit were the eastern gophe...
”根据文章的第二段的第一句话“In parts of the Pacific Northwest, the owls are now believ ed to be causing a drop in the population of a smaller, less aggressive bird: the northern spo tted owl.(在太平洋西北部的部分地区 ,这种猫头 鹰现在被认为造成了一种较小的、 攻击性较小的鸟 类数量...
We compared species composition and relative abundance of small mammals between riparian and upland habitats among five seral stages in the Coast Range of ... D.M. Gomez,R.G. Anthony - 《Northwest Science》 被引量: 118发表: 1998年 Population dynamics of small rodents in the southern boreal ...
Seasonal variation in the diet of Long-eared Owl, Asio otus, in the desert of Northwest China Regurgitated pellets (n = 584) of Long-eared Owl (Asio otus) were collected for three seasons from Gansu Endangered Animal Research Center, Gansu Province,... S Song,W Zhao,J Zhao,... - 《...