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Brood parasitism: Eastern Phoebe (Sayornis phoebe) nest with begging Brown-headed Cowbird (Molothrus ater) nestling. Cowbird nestling is large, has red gape, eyes open. Phoebe nestlings are smaller, have yellow gape, eyes still closed, New York, USA<br />
Slide # B105-41 (Digitally retouched image)<br />
Digitally retouched image (background cleaned up)