[KarlInOhio]

Big Bird? Is it named after the cuckoo which survives by brood parasitism where the mother bird lays her eggs in another bird's nest. Often the chick will end up bigger than the surrogate "parents" demanding more and more food, starving the "parents'" actual offspring.

[cripplecreek]

Starlings are the same way. I see robins feeding near adult starlings around the yard every spring.