North American Birds

VOLUME 70 NO1 2017

A Quarterly Journal of Ornithological Record Published by the American Birding Association. The mission of the journal is to provide a complete overview of the changing panorama of our continent’s birdlife.

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Fig. 2. Blue-throated Hummingbird is the primary species with which this species might be confused; in proper lighting, the lovely pink gorget is an obvious feature allowing for separation. Photo by © Annie Lavoie. N O R T H A M E R I C A N B I R D S 8 A M E T H Y S T - T H R O AT E D H U M M I N G B I R D I N Q U É B E C of white tail corners, always present re- gardless of age and sex, and repeated clear views of a pink—not blue—gorget (Ed - munds et al. 2011). Upon arrival to the feeder, the hum- mingbird uttered grating, insect-like staccato calls. They can be heard on the recording embedded in the eBird check - list from July 30, 2016 (tinyurl.com/ eBird-S30955114). Though recordings of Amethyst-throated Hummingbird are rare, these match a xeno-canto submittal from Volcan Nieve, Jalisco, by Andrew Spencer (XC330586). It corresponds to the feed - ing call, one of four vocal types given by the Amethyst-throated Hummingbird (Or- nelas et al. 2002), quite different from the Blue-throated Hummingbird's equivalent calls (Williamson 2001). Generally exhibiting shy behavior, more so than the regular Ruby-throats, the Amethyst-throated Hummingbird spent between a few seconds to one minute at Description and Identification At first sight, this hummingbird dwarfed the surrounding Ruby-throated Humming- birds, Archilochus colubris. The Amethyst- throated Hummingbird shows a green crown and mantle, grading to a dull bronze rump. The tail is broad and only slightly notched, blackish with faint gray corners. A prominent white post-ocular stripe and thin buffy malar are set off by sooty auricu - lars. The gorget appears gray in most lights, varying from pinkish-purple to a sizzling Barbie-pink depending on the angle. The under-parts were a medium grey infused with dull green. Bill was strong, medium length with slight camber, and no appar- ent corrugations. These marks are depicted in Figs. 1–7 and described in the captions therein. This hummingbird is most likely to be confused with Blue-throated Humming- bird, Lampornis clemenciae, which was dis- carded as a possibility due to the absence Fig. 3. Visits to the feeder were fairly frequent on the first day the hummingbird was observed—on that day, it made an appearance roughly every thirty minutes. It was last seen at sunset the following day, by which time its visits had become increasingly infrequent. Photo by © Annie Lavoie.

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