Home Biology Organisms and Populations Population Interactions Cow birds lay their eggs in the nest of smal…
Biology Organisms and Populations Population Interactions Single Correct MCQ
Published on: August 21, 2026

Cow birds lay their eggs in the nest of smaller birds. The fast - developing cow birds chicks hatch first, they push the other baby chicks out of the nest as they hatch. The Cow bird is classified as a-

A
Pathogen
B
Parasite
C
Mutualist
D
Commensal

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The correct answer is:
B

This is an example of brood parasitism, where the cow bird lays its eggs in the nest of another bird and the host bird unknowingly raises its young. The cow bird chick even eliminates competition by pushing out the host chicks, which clearly benefits the cow bird while harming the host species.

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