ML85690191

Age

Not specified

Sex

Not specified

Tags

In-hand; Watermark

Observation details

Mark's photos had confirmed that the bird was a Selasphorus hummingbird (and more than likely a Rufous), but according to Allen this was a bird that required hand measurements to confirm that it was not an Allen's Hummingbird. The second retrix, r2 (tail feather) in immature Rufous Hummingbirds are normally notched at the end, except in some cases (here) where it is rounded. Precise measurements of r1 (central) and r5 (outermost) are then needed to determine the width, which allows differentiation of Rufous from Allen's. Other measurements were needed to confirm sex and age. Examination of the bird revealed a partially deformed bill. And, according to Allen "usually females have a dozen or two dozen iridescent gorget feathers (not tiny ones either)". This bird also was showing little-to-no evidence of molt, which is unusual. Its weight was at the low end of a healthy range, and it showed no body fat. So, hopefully it'll stay around and find enough nourishment before heading on its way. Allen gave Mark the little hummer to release, and after a few moments in his hands the bird flew to the Sycamore tree overhead, then over to hedges, before making a few passes at the feeder and disappearing over the house. We didn't stay, and let Mark go out to get more nectar. Congratulations, Mark! Wayne Co. first Rufous couldn't happen to a better guy! And thanks to Allen Chartier for the biology lessons! The hummer would return to the feeder just before I left.

Technical information

Dimensions

800 pixels x 531 pixels

Original file size

74.46 KB