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Montana Field Guide

Montana Field Guides

Great-tailed Grackle - Quiscalus mexicanus

Native Species

Global Rank: G5
State Rank: SNA

Agency Status


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Copyright by: The Macaulay Library at the Cornell Lab of Ornithology, Ithaca, NY, all rights reserved.
General Description
The Great-tailed Grackle breeds from Mexico and the Gulf Coast of Texas north to central California, central Nevada, Utah, Colorado, Kansas, and Iowa (Sibley 2014). This species is a year-round resident throughout the southern portion of its range (Sibley 2014). In Montana, the Great-tailed Grackle has only a few observations, including three records with direct evidence of breeding in Dillon in 2014, 2015, and 2016, and a single record with indirect evidence of breeding at Bowdoin National Wildlife Refuge in 1996 (Marks et al. 2016, Montana Bird Distribution Committee 2012).

For a comprehensive review of the conservation status, habitat use, and ecology of this and other Montana bird species, please see Marks et al. 2016, Birds of Montana.

Species Range
Montana Range Range Descriptions


Western Hemisphere Range


Observations in Montana Natural Heritage Program Database
Number of Observations: 89

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density


SUMMER (Feb 16 - Dec 14)
Direct Evidence of Breeding

Indirect Evidence of Breeding

No Evidence of Breeding

WINTER (Dec 15 - Feb 15)
Regularly Observed

Not Regularly Observed


(Observations spanning multiple months or years are excluded from time charts)

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Citation for data on this website:
Great-tailed Grackle — Quiscalus mexicanus.  Montana Field Guide.  .  Retrieved on , from