ScienceActuallyCuckoos are brood parasites - laying eggs in the nests of other birds, which raise the chick thinking it is one of their own.
The bigger bird in this photo is the cuckoo chick being fed by its tricked, and much smaller surrogate mother.
Cuckoos are brood parasites - laying eggs in the nests of other birds, which raise the chick thinking it is one of their own.
The bigger bird in this photo is the cuckoo chick being fed by its tricked, and much smaller surrogate mother.