The prothonotary warbler (Protonotaria citrea) name originates from "Prothonotary" which originally referred to a group of official scribes in the Catholic Church who wore bright yellow hoods, as this bird appears to do. It is the only member of the genus Protonotaria. It is unique among eastern warblers in its habit of nesting in holes in trees, rather than in the open; it will sometimes nest in birdhouses placed close to the water. Once called the Golden Swamp Warbler, it has an olive-green back and blue-grey wings and tail. Head, neck, and underparts are vibrant yellow and the undertail coverts are white. Bill, legs and feet are black.
