Birds & Blooms on MSN7d
Calliope Hummingbird: Smallest Bird in the U.S.
Learn what a Calliope hummingbird looks like, where to find these tiny birds in the U.S., and how to attract them.
Phys.org1mon
How hummingbird torpor allows for day-to-day survival in an uncertain environment
In his research, Halter looked at two species of migrating hummingbirds, Calliope (Selasphorus calliope) and Rufous hummingbirds (Selasphorus rufus), at a site along the Mimbres River in New Mexico.