The Ruby-throated Hummingbird is 7–9 cm long with an 8–11 cm wingspan, and weighs about 3 g. Adults are metallic green above and greyish white below, with near-black wings. Their bill is long, straight and very slender.
The adult male has a ruby red throat patch which may appear black in some lighting, and a dark forked tail. The female has a dark rounded tail with white tips and generally no throat patch, though she may sometimes have a light or whitish throat patch.
The male is smaller than the female, and has a slightly shorter beak. A molt of feathers occurs once per annum, and begins during the autumn migration.
Taken in my yard on 7-17-10 in Amherst, Virginia, USA. with my Canon Powershot SX110 IS – Best viewed large
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