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Southeastern Arizona Bird ObservatoryAvian Oddities

A Hybrid Hummingbird in Ramsey Canyon

photos by Sheri Williamson

Hummingbirds hybridize frequently, and numerous combinations
have been sighted in southeastern Arizona.

The individual illustrated below was photographed in August 2006
at the feeding station at Ramsey Canyon Preserve in the Huachuca Mountains
during the Institute for Field Ornithology Hummingbirds Workshop
taught by Sheri Williamson and Tom Wood of SABO.

 

From the side, we see what looks like an adult male Broad-billed, except that there seems to be too much black on the bill, the throat and breast don't appear quite blue enough, and the white spot usually present behind the eye is almost nonexistent.

  From the back, the green-washed central tail feathers with no gray tips and dull bronzy rump and lower back represent more drastic departures from normal plumage for an adult male Broad-billed.

 

Most hybrid hummingbirds show a fairly balanced blending of characteristics from the two parent species. For a hybrid to look this much like a Broad-billed, it seems likely that the other parent species is very similar in appearance, at least in adult male plumage. The most likely candidate is Berylline, a rare but nearly annual summer visitor to the Huachuca Mountains that is known to have nested several times in Ramsey Canyon. Both sexes have extensive metallic green "bibs," dull bronzy lower backs, little or no white behind the eye, and bills that are orange only on the lower mandible. In both sexes of Berylline, the most distinctive field mark is a cinnamon-buff stripe in the wing, a muted version of which is present in at least three probable Berylline X Magnificent hybrids observed in the Huachuca Mountains. The apparent absence of a wing stripe on this hybrid makes its parentage somewhat more speculative. Nevertheless, Broad-billed X Berylline seems to be the best fit for its characteristics and location.


Photos © 2006 Sheri Williamson
Use or distribution without the express consent of the photographer is prohibited by international law.


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