Wednesday, May 2, 2012

Common Grackle


Relationship with humans

The range of this bird expanded west as forests were cleared. In some areas, it is now considered a pest by farmers because of their large numbers and fondness for grain. Despite a currently robust population, a recent study by the National Audubon Society of data from the Christmas Bird Count indicated that populations had declined by 61% to a population of 73 million from historic highs of over 190 million birds.

Unlike many birds, the grackle benefits from the expansion of human populations due to its resourceful and opportunistic nature. The common grackle population has greatly increased in the Austin, Texas, area in recent years and is regarded as nuisance by some, due to aggressive behavior. Common grackles are considered a serious threat to crops by some, and notoriously difficult to exterminate and usually require the use of hawks or similar large birds of prey.

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