Scientists have shown that many birds affected by the parasitic Common Cuckoo — which lays its lethal offspring in other birds' nestshave evolved distinctive patterns on their eggs in order to distinguish them from those laid by a cuckoo cheat.


Image: Mary Caswell Stoddard/Natural History Museum

Share This Story

Get our newsletter


Kay Mariev

It's kind of hilarious when you see the little songbird feeding the cuckoo chick that's like 3 times its size.

Get with it bird! That is not your baby!