Do Hummingbirds Hum?
West, George C.; Butler, Carol A.
The Hummingbirds of North and Central America (set of four pamphlets)
Edwards, Ernest P.
Illustrations by Edward Murrell Butler
Handbook of the Birds of the World, Volume 5: Barn Owls to Hummingbirds
Del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi
Hummingbirds and Butterflies
THOMPSON, Bill III; TOOPS, Connie
About Hummingbirds: A Guide for Children [HC]
Illustrations by John Sill
Sibley's Hummingbirds of North America
SIBLEY, David Allen