Field wagtail

any one of several species of wagtails of the genus Budytes having the tail shorter, the legs longer, and the hind claw longer and straighter, than do the water wagtails. Most of the species are yellow beneath. Called also yellow wagtail.

See also: Wagtail

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.