Cowbirds in Tree (IMAGE)

University of Illinois at Urbana-Champaign, News Bureau

Cowbirds in Tree

Caption

More female than male cowbirds are hatched early in the nesting season, and the pattern is reversed in July, new research finds. An adult female cowbird, upper right, perches on tree stems above an adult male cowbird.

Credit

Photo (c) by Michael Jeffords and Sue Post

Usage Restrictions

Photo may be used with stories about the research described in this release. Credit required: Photo (c) by Michael Jeffords and Sue Post

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