Which birds of the order Cuculiformes often lay their eggs in the nests of other species?
Correct answer: Cuckoos

Player Elf Counsel
BrilliantSkin7, Hence the expression A cuckoo in the nest. Meaning one who doesn't fit in.

quicksilver
Player Elf Counsel, also the term cuckold

caliro
cowbirds lay their eggs in other birds nests too.

Bonnie
Mockingbirds will Siri do that.

AngelicQuetzalcoatl5
I'm entertained