Fatal delay

Fatal delay

The period of time between sunrise and sunset is used for orientation by migratory birds such as cranes.
© action press/Panthermedia

Most animal species have their offspring when the food supply at the breeding site is optimal. However, as a result of global warming, migratory birds often return to their breeding grounds too late.

by CHRISTIAN YOUNG

The small, conspicuously white and black-brown marked pied flycatcher spends the winter period from September to March

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