Wednesday, September 6, 2017

MacGillivray's Warbler

Continuing to share my warbler photos along with information about each species, from my latest book: "Warblers of Arizona, A Guide to Finding and Photographing Warblers in Southern Arizona." 

If you are interested in purchasing it, please email me at or

MacGillivray's Warbler

Common Name: MacGillivray’s Warbler
Scientific Name: Geothlypis tolmiei
Conservation Status: Least Concern, 35% decline in population in the past 50 years due to habitat loss, total population estimated at 12 million
Size: 5.9 inches

Description: olive back; blue-gray hood over head, nape, chin, throat, and breast; thick white eye arcs; black lores; medium thick yellow bill; dull yellow belly and undertail; medium long tail; no wing bars; pinkish legs
Male/Female: male has darker chin and breast
Range: British Columbia to Panama, Pacific Coast to Colorado/New Mexico
Migration: winters in Central America, summers along the Pacific Coast of North America
Season for Arizona: April/May and August/September
Habitat: low dense underbrush; skulks on or near the ground except when singing
Community Behavior: solitary
Feeding Behavior: forages by hopping around in dense brush
Diet: Insects, especially caterpillars and beetles
Nesting Behavior: well hidden loosely constructed nest in dense shrubs just off the ground; 3-5 creamy white eggs with brown spots; incubation 11-13 days; both parents feed young; young leave nest in 8-9 days
Where to Find in Southern Arizona: Empire Gulch, San Pedro River, Santa Cruz River, Sabino Canyon, Huachuca Canyon, other mountain canyons in low dense brush
Comments: named after the Scottish ornithologist William MacGillivray, although actually reported first by John Kirk Townsend (Although there was/is already a Townsend’s Warbler); usually solitary, hybridizes with Mourning Warbler

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