The family Parulidae includes 57 species found in North America.
Warblers are among the most colorful birds found in North America. They are small, active birds with sharp, pointed bills. They feed on insects. Birds that feed on the ground are often a drab tan or brown color while warblers that feed higher up are often colored a bright yellow and black. Males in breeding plumage are the most colorful. Females and males in the fall can be surprisingly drab and difficult to identify. Warblers nest in a cup-shaped nest on the ground or in a bush or tree. A few nest in cavities.
Cape May Warbler
Black-throated Blue Warbler
Black-throated Gray Warbler
Black-throated Green Warbler
Wood-Warblers - Patuxent Bird ID Center
Don Roberson's Bird Families of the World
Warblers of Canada
Warblers of Eastern North America