Bill short, or of moderate length, rather slender, somewhat conical, considerably broader than high at the base, gradually compressed toward the end; upper mandible with its dorsal outline straight until near the end, the point very narrow, the notches very slight; lower mandible with the angle rather short and narrow, the dorsal line straight, the edges somewhat involute, the tip acute. Head moderate, ovate; neck short; body rather slender. Feet of moderate length; tarsus longer than the middle toe, slender, much compressed, with eight anterior scutella, of which the upper are blended; toes rather small, or of moderate size, hind toe proportionally stout, outer adherent for a short way at the base; claws moderate, much compressed, arched, acute. Plumage generally soft and blended. Wings of moderate length. Tail of moderate length, of twelve feathers. Tongue of moderate length, sagittate, tapering. OEsophagus of moderate width, without dilatation; proventriculus bulbiform; stomach of moderate size, roundish or elliptical, moderately muscular, with the muscles distinct; epithelium dense, longitudinally rugous; intestine short, rather wide; coeca very small; cloaca oblong. Trachea simple, with four pairs of inferior laryngeal muscles.

Genus I : Flycatching Warbler

Genus II : Wood-Warbler

Genus III : Ground-Warbler

Genus IV : Swamp Warblers

Genus V : Black-and-White Warbler

About This Guide

High-resolution images courtesy of the John James Audubon Center at Mill Grove, Audubon, PA, and the Montgomery County, PA, Audubon Collection. Learn more about the John James Audubon Center