In the 1960?s the USDA established a program referred to as the Bye Bye Blackbird program. This program is solely responsible for the mass killings of what could ultimately be millions of birds across the nation. In 2009 alone the USDA poisoned and killed over 4 million birds. The documents state whether or not the deaths were intentional or unintentional on the government website. You can find extremely large numbers, such as 22,276 blackbirds marked as intentionally euthanized. Here is some data from the USDA itself:
Brown-headed cowbirds: 1,046,109
European Starlings: 1,259,714
Red-winged blackbirds: 965,889
Canadian Geese : 24,519
Pigeons: 96,297
Grackles: 93,210
Starlings European: 1,259,714
http://worldtruth.tv/usda-admits-exterminating-birds-crops-and-bees/
Brown-headed cowbirds: 1,046,109
European Starlings: 1,259,714
Red-winged blackbirds: 965,889
Canadian Geese : 24,519
Pigeons: 96,297
Grackles: 93,210
Starlings European: 1,259,714
http://worldtruth.tv/usda-admits-exterminating-birds-crops-and-bees/