WHAT DO EUROPEAN CUCKOOS AND BROWN-HEADED COWBIRDS HAVE IN COMMON

71.

What do European Cuckoos and brown-headed cowbirds have in common?

A. They are both rejector species.

B. Their eggs do not closely mimic host eggs.

C. They lay their eggs in the nests of other birds.

D. They have been known to parasitize over 200 other species.