Bird Info

Gray Hawk /aguililla gris (Asturina nitida)

Voice: Frequently heard alarm call is a very high-pitched “keeEEEErrr.” Also gives a repeated, whistled flight call, “hooweeoo, hooweeoo,….”

Gray Hawk
Status: Locally uncommon resident along the Rio Grande from Santa Ana NWR to Falcon Dam; very rare east to Sabal Palm Grove in Brownsville.

Habitat: Riparian woods along Rio Grande.

Best Spots: Santa Ana NWR, Anzalduas County Park, Bentsen SP, Saliñeno, and Chapeño.

Similar Species: Maybe confused with Red-shouldered Hawk in winter, but adult Gray Hawk is gray above and below with pale underwing. In flight, juvenile Gray Hawks show a distinctive white “U-shaped” band on rump.

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All Bird call recordings © John C. Arvin.
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A Birder's Eye View of the Seasons in the Lower Rio Grande Valley  

Welcome to a birder’s eye view of the seasons in the Lower Rio Grande Valley. Enjoy our annual cycle! The resulting avifauna in deep South Texas is the most diverse north of the Mexican border. The four county area that makes up the lower Rio Grande Valley has recorded over 500 species of birds. This is more species of birds than have been recorded in all but two or three entire states. Small wonder that birders from across the continent make pilgrimages to the region. Happy Birding!

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