Geothlypis tolmiei
MacGillivray's Warbler is a small, energetic New World Warbler, scientifically classified as *Geothlypis tolmiei*, measuring 11-13 cm in length with a wingspan of 16-19 cm and weighing 9-13 g. It is easily identified by its distinctive "spectacled" appearance: prominent white arcs above and below the eye, contrasting with a gray hood that extends to the breast in breeding males. Its back is olive-green, and its underparts are bright yellow, often with a faint olive wash on the flanks. This sp...
Found in dense, moist undergrowth; particularly favors riparian thickets, willow/alder stands, and brushy clearings within deciduous or mixed coniferous forests, often at mid-to-high elevations.
Primarily insectivorous, consuming caterpillars, beetles, flies, true bugs, and spiders, gleaned from foliage or caught in short aerial pursuits.
MacGillivray's Warbler is a diurnal and highly active species, known for its secretive, skulking nature within dense vegetation. It primarily forages by gleaning insects from foliage and branches, usually close to the ground, but will also make short aerial sallies. Males are highly territorial d...
The breeding range of MacGillivray's Warbler encompasses western North America, extending from southeastern Alaska and British Columbia south through the Pacific Northwest states of Washington and Oregon, and inland through the Rocky Mountain states including Idaho, Montana, Wyoming, Colorado, Ut...
Least Concern
- John James Audubon named this warbler after his Scottish ornithologist friend, William MacGillivray. - It was formerly classified in the genus *Oporornis* but is now grouped with its close relatives, the Common Yellowthroat and Mourning Warbler, in *Geothlypis*. - The prominent white arcs aroun...