Clear-cuts in coniferous forest, mixed deciduous forest, and riparian areas and thickets. Requires dense understory.Back to top
Insects.Back to top
An open cup of coarse grass and other plant fiber, placed at or near ground level under dense shrub cover.
|Clutch Size:||2-6 eggs|
|Egg Description:||Creamy white, with variable tints and speckling.|
|Condition at Hatching:||Helpless and naked.|
Feeds at or just above ground level. Usually gleans from low branches.Back to top
MacGillivray's Warbler populations declined by about 35% between 1966 and 2014, according to the North American Breeding Bird Survey. Partners in Flight estimates a total breeding population of 12 million, with 43% spending some part of the year in the U.S., 84% in Mexico, and 56% breeding in Canada. The species rates an 11 out of 20 on the Continental Concern Score. MacGillivray's Warbler is not on the 2014 State of the Birds Watch List. This warbler has a preference for cleared or regenerating land, and therefore has probably benefited from human land-use practices such as logging and mining.Back to top
North American Bird Conservation Initiative. (2014). The State of the Birds 2014 Report. US Department of Interior, Washington, DC, USA.
Partners in Flight (2017). Avian Conservation Assessment Database. 2017.
Pitocchelli, Jay. (2013). MacGillivray's Warbler (Geothlypis tolmiei), version 2.0. In The Birds of North America (P. G. Rodewald, editor). Cornell Lab of Ornithology, Ithaca, New York, USA.
Sauer, J. R., J. E. Hines, J. E. Fallon, K. L. Pardieck, Jr. Ziolkowski, D. J. and W. A. Link. The North American Breeding Bird Survey, results and analysis 1966-2013 (Version 1.30.15). USGS Patuxtent Wildlife Research Center (2014b). Available from http://www.mbr-pwrc.usgs.gov/bbs/.
Sibley, D. A. (2014). The Sibley Guide to Birds, second edition. Alfred A. Knopf, New York, USA.
Stephenson, T. and S. Whittle (2013). The Warbler Guide. Princeton University Press, New Jersey, USA.