You’ll know it’s a male rufous hummingbird (Selasphorus rufus) if you see its back completely covered with coppery orange feathers. Males are reddish brown on the back, base of crown and most of the ...

CU Boulder researcher analyzes 50 years of data to show the relationship between certain birds’ unorthodox behavior and their traits Hummingbirds are iconic, easily recognized by their plumage, ...

The Giant Hummingbird of western South America is not one species but two, according to an international group of researchers. The northern population stays in the high Andes year-round while the ...

Explore an interactive avian tree of life that reveals how 11,000 bird species are connected through millions of years of ...

The male Allen’s hummingbird has warm rusty-orange flanks, breast band, face, neck, and tail, as well as a green back and crown. They often have a rusty-orange rump, and sometimes show rusty-orange at ...

Whether sipping nectar from flowers and zipping through the air, hummingbirds are a sure sign of spring in California. The itty-bitty birds are busy breeding and building nests, which means there are ...

I call nonbreeding species in our region "out-of-season, out-of-range birds." Maryland now has four documented nonbreeding hummingbird species on the state list: rufous, calliope, Anna's and Allen's ...