Golden-cheeked Warbler (Setophaga chrysoparia) parents caring for thier nestlings.  (IMAGE)

Proceedings of the National Academy of Sciences

Golden-cheeked Warbler (Setophaga chrysoparia) parents caring for thier nestlings. 

Caption

Golden-cheeked Warbler (Setophaga chrysoparia) parents caring for thier nestlings. 

Credit

Image credit: Gil Eckrich (photographer)

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