The Yellow-breasted Chat (Icteria virens) is a large songbird, widely considered the most atypical member of the New World warbler family, though the long-standing suspicion is that it does not actually belong there. Its placement is not definitely resolved. It is the only member of the genus Icteria.
Yellow-breasted Chats are the largest species of New World warbler. In fact, they can often weigh more than twice as much as their alleged cousins. This species reaches a total length of 17 to 19.1 cm (6.7 to 7.5 in) and a wingspan of 23 to 27 cm (9.1 to 10.6 in). Body mass can range from 20.2 to 33.8 g (0.71 to 1.19 oz). Among standard measurements, the wing chord is 7.1 to 8.4 cm (2.8 to 3.3 in), the elongated tail is 6.9 to 8.6 cm (2.7 to 3.4 in), the relatively long, heavy bill is 1.3 to 1.6 cm (0.51 to 0.63 in) and the tarsus is 2.5 to 3.1 cm (0.98 to 1.22 in). These birds have olive upper-parts with white bellies and bright yellow throats and breasts. Other signature features of Yellow-breasted Chats are its large white eye-rings and blackish legs. If seen, this species is unlikely to be mistaken for any other bird.