 Breeding evidence |
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Click on plot to view table of mean abundance
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Number of squares
Long-term BBS trends
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Mean abundance (number of birds detected per 5 min. point count) and percentage of squares occupied by region Bird Conservation Regions [abund. plot]
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Atlas Results
MacGillivray's Warblers are extremely range limited in Saskatchewan and were detected in only nine squares in the Cypress Upland ecoregion. Singing males were most often encountered and at least two males were determined to be on territory near the Conglomerate Cliffs in the Cypress Hills Interprovincial Park, representing the highest breeding evidence obtained during the atlas period.
Excerpts Adapted from the Birds of Saskatchewan:
Although the loud song of territorial males is hard to miss, their skulking habits make them difficult to observe in dense shrubbery. MacGillivray's Warbler is a breeding bird of the coniferous and mixedwood forests of the western mountains from southern Alaska and the Yukon to northern Mexico, wintering in Central America. Many disjunct populations occur, especially in the southwest US and on the Great Plains; one such population occurs in the Cypress Hills area of Alberta-Saskatchewan.
MacGillivray's Warblers prefer mature mixedwood forest with plentiful shrubby undergrowth usually associated with slopes, such as along creeks and drainages.
This warbler is a fairly common summer resident in the extreme southwest (Smith 1996). Although occurring mainly in the Cypress Hills and associated creek valleys and ravines, it has also been noted during the breeding season around the confluence of the Red Deer and South Saskatchewan Rivers west of Leader (Salt 1973) and at Wood Mountain where its eastern boundary remains unclear.
Original text by Robert D. Wapple and Lorrie Sielski. Text adapted by Daniel J. Sawatzky
Read more about the MacGillivray's Warbler in the Birds of Saskatchewan here.
Recommended citation: Latremouille, L. M. 2025. MacGillivray's Warbler in Latremouille, L. M., S. L. Van Wilgenburg, C. B. Jardine, D. Lepage, A. R. Couturier, D. Evans, D. Iles, and K. L. Drake (eds.). 2025. The Atlas of the Breeding Birds of Saskatchewan, 2017-2021. Birds Canada. Saskatoon, Saskatchewan https://sk.birdatlas.ca/accounts/speciesaccount.jsp?sp=MGWA&lang=en [09 Nov 2025]
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