Desert birds lay larger eggs when they have more helpers to feed their chicks, new research shows. White-browed sparrow weavers live in family groups in which only a dominant pair breeds and their ...
The number of eggs a bird lays — its clutch size — varies greatly among species. You might think every species should simply lay lots of eggs because that would increase the odds of more young birds ...
Fork-tailed drongos have a signature color and pattern on their eggs, which helps them avoid getting duped by African cuckoos. Hans Stieglitz via Wikimedia Commons under CC BY-SA 3.0 Cuckoos have ...
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