Great-tailed Grackle, Quiscalus mexicanus, grackle, range expansions, population changes, blackbirds
In 1900, the range of the Great-tailed Grackle extended north of the Mexican border only into Texas. Since then, it has expanded its range greatly. It now nests in 14 states and has strayed to an additional eight states and three Canadian provinces. Much of this expansion has occurred since 1960. Great-tails often stray far from their normal range, especially in spring. Most of these strays are single individuals. In states where they have nested, breeding birds typically reach the state a few years after the first reports of the species. Great-tailed Grackles do well in a variety of human altered habitats. Their range expansion in North America rivals that of the Cattle Egret both in its extent and as an example of a species thriving while living in close association with humans.
Journal of the Iowa Academy of Science
© Copyright 1993 by the Iowa Academy of Science, Inc.
Dinsmore, James J. and Dinsmore, Stephen J.
"Range Expansion of the Great-tailed Grackle in the 1900s,"
Journal of the Iowa Academy of Science: JIAS: Vol. 100:
, Article 4.
Available at: http://scholarworks.uni.edu/jias/vol100/iss2/4