Neotropical migratory birds from warblers to sparrows are declining at alarming rates-rates that are not sustainable .

新热带区候鸟从莺鸟到麻雀都会以惊人的速度往下飞这种速率是不能忍受的。

For example , in europe , study has been done of blackcap warblers . We just call them blackcaps .

比方说，在欧洲，关于黑顶莺做过了一些研究，我们仅仅把它们叫做黑顶。

So they 're pretty close to the ground , but these warblers also nest in forests that have low shrub density .

所以，它们倾向于接近地面，但是这些蓝莺也会在有着稀疏灌木丛的森林里面筑巢。

Cuckoos would have good reason to do so , since the warblers and other small birds in whose nests theylay their eggs are understandably frightened of hawks , and give them a wide berth .

杜鹃有很好的理由去模仿鹰，由于莺和其它的小型鸟类在它们的巢中产卵，自然这些小型鸟类就很害怕鹰，并且对鹰敬而远之。

Our winter visitors , including swans , short-eared owls , meadow larks and shrikes , are departing for their breeding grounds , while swallows , warblers , hummingbirds , thrushes and other species are arriving for the nesting season here .

冬季的访客像天鹅短耳猫头鹰还有野百灵鸟百舌鸟开始上路远赴繁殖地而在这里筑巢繁殖的如燕子苔莺，蜂鸟画眉等陆续来到。