And because weissensee is such a deep forest , ornithologists doing serious birds of prey research show up to climb its trees and count the number of goshawk fledglings in cemetery nests .

而且因为魏森塞是一片很深的森林，对猛禽做严肃研究的鸟类学家也会出现在此地，爬树并计算鸟巢中苍鹰雏鸟的数目。

In spring , caterpillars time their emergence to coincide with the bud burst of trees ; birds start nesting when they can feed those newly emerged caterpillars to their fledglings .

春天，毛毛虫的出现时间和树木的萌芽一致；鸟儿开始筑巢的时间要跟毛虫出现的时间吻合，用来哺育幼鸟。

The family is united and return to their nest where their roles are reversed as the fledglings guard their injured mother .

这家庭是团结的然后归回他们的巢，在那里他们的角色被颠倒了，因为雏鸟保护了他们受伤的妈妈。