Rufous Hummingbird (Selasphorus rufus)
Often described as "feisty," the Rufous may have the ideal size-to-weight ratio among North American hummingbirds. This bird outflies all other species, and usually gets its way at feeders at the expense of slower, less-maneuverable hummers. The Rufous has the longest migration route of all US hummingbirds.
Average weight: male 3.22 g, female 3.41 g. Females are larger than males.
Adult male: Non-iridescent rufous crown, tail, and sides; back may be rufous, green , or some of each; bright orange-red gorget, white breast. Green-backed Rufous cannot be reliably separated from Allen's in the field without extensive experience and a good view of the spread tailfeathers through a scope.
Adult female: Green back and crown, white breast, streaked throat, rufous sides and base of tail feathers, white tips on outer tail feathers. Very similar to female Allen's and Broad-tailed.
Observed in every state and province except Hawaii, Prince Edward Island, and Quebec. There was even one very unusual report from extreme eastern Siberia! The Rufous is the most widely-distributed hummingbird in North America. Winters in Mexico and possibly Panama.