Why do Texas grackles congregate in great gregarious mobs at parking lots, parks, airports during the winter?

Some of the more common birds we see here in Texas are the grackles. You can hardly walk through a supermarket parking lot without seeing one of these brown or black birds peering out at you from ...

The Common Grackle – A medium-sized blackbird whose plumage is black, and has a sheen that is glossy and iridescent. Common Grackles range over almost all of eastern North America east of the Rockies, ...

That raspy cluck, cluck, cluck clucking noise starts even before I slide open the patio door each morning to let my bird dog out. Sometimes the black shape of a large bird makes a pass in front of the ...