Cape May Warbler

This bird is a small passerine and is a mid-sized New World warbler. Length can vary from 12–14 cm (4.7–5.5 in), wingspan is 19–22 cm (7.5–8.7 in), and body mass can range from 9–17.3 g (0.32–0.61 oz). Among standard measurements, the wing chord is 6.1–7.3 cm (2.4–2.9 in), the tail is 4.3–5 cm (1.7–2.0 in), the bill is 0.9–1.2 cm (0.35–0.47 in) and the tarsus is 1.7–1.9 cm (0.67–0.75 in). The adult male Cape May warbler has a brown back, yellowish rump and dark brown crown. The underparts are yellow streaked with black, giving rise to the bird's scientific name. The throat and nape are bright yellow and the face has a striking chestnut patch framed in yellow with a black eyestripe. There is a narrow white wing bar. Plumages of the female and immature male resemble washed-out versions of the adult male, lacking the strong head pattern. The yellowish rump, and at least indications of the white wing bar, are always present.