The forest's dense growth provides nesting places for a wide variety of birds.
森林里茂密的植物为各种各样的鸟儿提供了筑巢的地方。
Avian influenza virus can cause serious disease in a wide variety of birds and mammals, but generally its natural host range is limited to wild ducks and gulls.
禽流感病毒可感染许多鸟类和哺乳动物,但是其自然宿主范围通常限于野生水禽,如野鸭、海鸥等。
There is accumulating evidence indicating that birds navigate by using a wide variety of environmental cues.
越来越多的证据表明,鸟类通过各种各样的环境线索来导航。
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