Fifty years ago the majority of the Canada goose population migrated annually to their nesting sites in the north. Humans have altered the dynamics of the Canada goose population through the importation of a non-migratory Canada goose subspecies and habitat alteration. The beautifully maintained and fertilized lawns that are now so popular across Connecticut are ideal habitats for Canada geese.
Successive generations of resident Canada geese have lost the instinct to migrate, breed earlier, have more offspring and live longer. In 2006, the U.S. Fish and Wildlife Service estimated that the national resident Canada goose population was 4.5 million with an average growth rate of 10 percent a year.
This surge in resident Canada goose populations has had a significant impact on the environment and has caused unwelcome human conflicts. Canada geese will often noisily and aggressively attack humans that approach their nesting sites or territory. They also produce copious amounts of waste every day that render the environment unsuitable for humans. These droppings are a potential health hazard harboring parasites, viruses, and bacteria such as cryptosporidiosis, giardiasis, salmonella, E. coli, influenza A, chlamydia, and hypersensitivity pneumonitis.