Ruby-throated Hummingbird

A Ruby-throated Hummingbird at the Arkansas River Valley Nature Center

The adult male, shown in the photo, has a ruby red throat patch, also known as a gorget 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 a year, and begins during the autumn migration. (Wikipedia)