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Canada Geese Give Hunters The Slip By Hiding Out In Chicago

Canada Geese Give Hunters The Slip By Hiding Out In Chicago

It’s open season for Canada geese in Illinois from mid-October to mid-January. Unfortunately for hunters, Canada geese are finding a new way to stay out of the line of fire. Rather than being “sitting ducks” in a rural pond, they’re setting up residence in the city.

University of Illinois ornithologist Mike Ward says he and a team of researchers conducted a recent study to try to find out why there were so many Canada geese in Chicago in the winter.

The study finds that 85 percent of the Canada geese wintered in the Greater Chicago Metropolitan Area, and none made foraging flights to agricultural fields within or outside of the urban area. Their arrival demonstrated uncanny timing as well. Approximately 70 percent of the geese the researchers were tracking returned to the Chicagoland area prior to open hunting seasons.

Ward says survival rate was also high.

With the tendency of Canada geese to stay put combined with their high survival rate when they choose to spend winter in the city, Ward says managing goose populations in the Greater Chicago Metropolitan Area may be challenging.

“Dense concentrations of geese in urban areas can pose threats to humans, including contamination of water sources, aggressive behavior toward humans, disease transmission, and strikes with aircraft,” Ward says. “Geese are the largest bird commonly struck by aircraft in North America and were responsible for 1,403 recorded bird strikes to civil aircraft from 1990 to 2012.”

The study notes that goose–aircraft strikes destroyed a $190 million U.S. Air Force aircraft, resulting in 24 human deaths, and led to U.S. Airways Flight 1549 crash-landing in the Hudson River in New York.

So, how can the geese be encouraged to leave?

“We have future studies that will investigate the best ways to harass geese to make them leave the city,” Ward says. “We are approaching this from an energy use perspective.

If the geese cannot find good sources of food and the harassment cause them to use energy, they may be forced to leave the city in search of food in agricultural fields.”

The paper, “Survival and habitat selection of Canada Geese during autumn and winter in metropolitan Chicago, USA,” is published in The Condor: Ornithological Applications by the American Ornithological Society. The research was conducted by Brett E. Dorak, Michael P. Ward, Michael W. Eichholz, Brian E. Washburn, Timothy P. Lyons, and Heath M. Hagy.

Funding for this work came from the Illinois Department of Natural Resources and the U.S. Fish and Wildlife Service through the Wildlife Restoration Program, Midway International Airport, and the University of Illinois.

Mike Ward is an associate professor in the Department of Natural Resources and Environmental Sciences in the College of Agricultural, Consumer and Environmental Sciences at the University of Illinois.

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