The Elf Owl (Micrathene whitneyi) is a member of the owl family Strigiae that breeds in the southwestern United States and Mexico. It is the world's second smallest owl, the first being a Pygmy owl. They are 5-12 inches tall and have a wingspan of 15-16 inches and short tails. Their primary projection extends nearly past their tail. They have fairly long legs and often appear bow-legged. They are 1-1.4 ounces.They can often be heard just after dusk or at sunset, calling to each other. Their call is a high pitched whinny or chuckle. The male and female dart around the trees and call back and forth.