15 April 2009

Sinaloa Wren

Another Sinaloa Wren has just been confirmed from Southeastern Arizona. There is a video here: http://www.youtube.com/watch?v=pn-NyQNQDaI

The Sinaloa Wren (Thryothorus sinaloa) is an endemic bird to Western Mexico and ranges northward to Sonora, just south of the American border. Previous Sinaloa Wren reports have not been accepted, but the birds presence in the United States has been debated and, by some, expected for many years. The first ABA record for this bird was found last year near Patagonia, Arizona, where it has resided since it was found on 25 August 2008. I was lucky enough to see the Patagonia bird on 2 January of this year, as it called and foraged among the trees at daybreak. This second bird has taken up residence at Fort Huachuca, a military base in the Huachuca Mountains near Sierra Vista. This is an entirely seperate bird and a first county record for Cochise County (the Patagonia bird is in Santa Cruz County). I cannot help but wonder whether or not Sinaloa Wrens will follow the same path as the Black-capped Gnatcatchers. The gnatcatchers, another West Mexican endemic, were first confirmed in the United States in the 1970's when a nest was found in Santa Cruz County, Arizona. Since that time, they have become more or less regular in the canyons of Southeastern Arizona and even in Guadelupe Canyon, in Southwestern New Mexico. Just this year alone, I have had well over a dozen Black-capped Gnatcatchers in Arizona in three of the canyons in the Santa Ritas, south of Tucson. Another bird expanding northward is the Rufous-capped Warbler (also in the Santa Ritas this year), and Eared Quetzals and Crescent-chested Warblers have begun showing up more north of their expected range. It seems to me that Arizona is undergoing a Mexican bird invasion, and I would not at all be surprised if more Sinaloa Wrens were reported by year's end.

And the quiz results: I know it wasn't up for long, but congratulations to David Bell and Andrew Spencer for correctly identifying the Clapper Rail (Rallus longirostris levipes) photographed south of San Diego, California in January 2009.

No comments:

Post a Comment