Parasitized bird nest: 2 Kirtland's warbler eggs, 1 brown-headed cowbird egg

Two small mostly white bird eggs next to one larger and darker spotted egg in a nest on the ground

Parasitized bird nest: 2 Kirtland's warbler eggs, 1 brown-headed cowbird egg

One cowbird egg is with two Kirtland’s warbler eggs in one nest, a result of a phenomenon known as brood parasitism or avian parasitism. This occurs when a bird lays its egg or eggs in the nest of another bird and leaves the responsibility of rearing the offspring to the other bird.
Image
Photo By/Credit
Cassandra Waldrop
Ecosystem
Forest
Media Usage Rights/License
Public Domain
Subject tags
Birds