The MacGillivray’s warbler (Geothlypis tolmiei) is a warbler species found in the New World. These birds are lethargic and heavy warblers, preferring to stay on or on the ground most of the time, save when singing.
Quick Overview: Geothlypis Tolmiei – MacGillivray’s Warbler
Body size: Around 5.25 in (13 cm) and a weight of 11 g (0.4 oz)
Main colors: Olive-Green, Yellow, White, Gray
Range: Western United States
Migratory Bird: Yes
Best time of the year to see in the U.S.: June, July, August, September
Conservation Status: Least Concern
MacGillivray’s Warbler Description
Olive-green upperparts and yellow underparts distinguish this medium-sized warbler. The white eye-ring has been broken, and the slate-gray hood has been extended over the upper breast, where it darkens to black.
These birds have a length of 5.25 in (13 cm) and a weight of 11 g (0.4 oz). Their wings could range from 8.25 in (21 cm).
Throughout the rest of the world, prey species include click, dung, and flea beetles, as well as alfalfa weevils and caterpillars.
Coniferous forest edges, burns, brushy cuts, or second-growth alder thickets and streamside vegetation are preferred environments.
It forages on or near the ground for insects. It frequently flicks its tail from side to side as it hops.
Geothlypis Tolmiei Scientific Classification
- Kingdom: Animalia
- Phylum: Chordata
- Class: Aves
- Order: Passeriformes
- Family: Parulidae
- Genus: Geothlypis
- Species: Geothlypis tolmiei
Best time of the year to see
The best time to see these birds in the United States is during the summer season (June – September).
Distribution of the MacGillivray’s Warbler in the USA
From the Northwest Territories and southeastern Alaska to northern Mexico, this long-distance Neotropical migrant breeds at low to moderate elevations among the Rocky and Sierra highlands.
The MacGillivray’s Warbler can be found in the following states in the United States – Arizona, Colorado, California, Oregon, Washington, Nevada, Kansas, Idaho, Montana, Wyoming, Utah, Texas, Nebraska, New Mexico, and Oklahoma.