通常，年轻的蓝莺将会在这些地方筑巢，因为有浓密灌木的首选的筑巢点已经被更年长的、地位更高的蓝莺所占领了。
It is usually the younger warblers that nest in these areas because the preferred spots where there are a lot of shrubs are taken by the older, more dominant birds.
相比在树上筑巢的同种类雏鸟，在地面筑巢的鸣禽雏鸟会发出频率更高的乞食叫声。
The young of ground-nesting warblers produce begging cheeps of higher frequencies than do their tree-nesting relatives.
人们发现，录音机在播放树上筑巢的鸣禽的乞食叫声时，比起在播放地面筑巢的鸣禽的乞食叫声时，鸟蛋被攻击的几率明显增大。
The eggs "advertised" by the tree-nesters' begging calls were found bitten significantly more often than the eggs associated with the ground-nesters' calls.
这并不奇怪，在树冠筑巢的鸟类种群的成员数量大幅下降，而在树洞或接近地面处筑巢的鸟类受的影响则小得多。
Not surprisingly, groups of birds that nest in the canopy of trees declined significantly, while species that nest in cavities or near the ground were affected far less.
如果说鸟们是依据基因模板筑巢的，那么你就会看到所有的鸟每次筑巢的方式是一样的。
If birds built their nests according to a genetic template, you would expect all birds to build their nests the same way each time.
过了一段时间，有一天，鸟建议道：“现在到了该筑巢的时候了，请你帮助我一起来筑巢吧。”
One day Bird said, "Now it is time to build nests. Please help me make a nest."
它证实了即使是早期恐龙也是集体筑巢的，与今天殖民鸟类筑巢相似。
It confirms that even early dinosaurs built nests in groups, similar to colonial birds nesting today.
虽然它的筑巢习惯和那些在平地筑巢的海鸥很相似，但悬崖的筑巢习惯还有很多重要的不同。
Although its nesting habits are similar to those of gulls that nest on flat ground there are a number of important differences related to the cliff - nesting habit.
筑巢点的地层表明恐龙会年复一年的返回筑巢地。
Nest locations within the strata indicate that the dinosaurs returned to the site year after year.
它们在悬崖或者海岸边筑巢，也有一些在草地上筑巢。
These birds nest on the rocky cliffs or along the coasts. Some make their nests in the grass.
它们在悬崖或者海岸边筑巢，也有一些在草地上筑巢。
These birds nest on the rocky cliffs or along the coasts. Some make their nests in the grass.
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