Seasonal Migrations
Common Grackle

The Common Grackle has a seasonal migration that is contained within North America, as seen in this animated map from Project FeedWatch. This map is an interpolated surface based on biweekly reports of FeederWatchers. It shows positive sightings of birds, with the darker green areas indicating more birds. Note the increase in the number of birds in the southern U.S. through February and the subsequent increase in the northern U.S. in March and April.

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