Daily Archives: January 22, 2018

Thicker eggshells help cuckoos hatch earlier than their nestmates

THE exhausting chore of raising young is one a few birds manage to avoid. By laying their eggs in the nests of others, they dupe those others into feeding their nestlings. Such brood parasitism has arisen independently at least three times, in the groups known as cuckoos, cowbirds and honeyguides. That gives biologists a tool with which to explore the ...

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