Researchers find migration risks likely led to drab colored female birds

[PhysOrg]

(Phys.org)—A trio of researchers with Trinity University in Texas has found that the development of dimorphism (physical differences between male and females of the same species) in songbirds appears to have been most strongly caused by migration. In their paper published in Proceedings of the Royal Society B, Richard Simpson, Michele Johnson and Troy Murphy describe a study they undertook of wood-warblers, a type of songbird and what they learned.

 

Read the full article on PhysOrg