What is "yellow-rumped warbler"

Myrtle \Myr"tle\ (m[~e]r"t'l), n. [F. myrtil bilberry, prop., a little myrtle, from myrte myrtle, L. myrtus, murtus, Gr. my`rtos; cf. Per. m[=u]rd.] (Bot.) A species of the genus Myrtus, especially Myrtus communis. The common myrtle has a shrubby, upright stem, eight or ten feet high. Its branches form a close, full head, thickly covered with ovate or lanceolate evergreen leaves. It has solitary axillary white or rosy flowers, followed by black several-seeded berries. The ancients considered it sacred to Venus. The flowers, leaves, and berries are used variously in perfumery and as a condiment, and the beautifully mottled wood is used in turning.

Note: The name is also popularly but wrongly applied in America to two creeping plants, the blue-flowered periwinkle and the yellow-flowered moneywort. In the West Indies several myrtaceous shrubs are called myrtle.

Bog myrtle, the sweet gale.

Crape myrtle. See under Crape.

Myrtle warbler (Zo["o]l.), a North American wood warbler ( Dendroica coronata); -- called also myrtle bird, yellow-rumped warbler, and yellow-crowned warbler.

Myrtle wax. (Bot.) See Bayberry tallow, under Bayberry.

Sand myrtle, a low, branching evergreen shrub ( Leiophyllum buxifolium), growing in New Jersey and southward.

Wax myrtle ( Myrica cerifera). See Bayberry.

The yellow-rumped warbler (Setophaga coronata), also known as the butter butt, is a North American bird species combining four closely related forms: the eastern myrtle warbler (ssp coronata); its western counterpart, Audubon's warbler (ssp group auduboni); the northwest Mexican black-fronted warbler (ssp nigrifrons); and the Guatemalan Goldman's warbler (ssp goldmani).