What the FLOCK Is Up With All the Geese?

For many people, winter means a visit from Canada Geese, and here at WeatherNation, we have a whole flock of questions about these seasonal guests, as many people are reporting a seeming increase in the number of geese in places they don't typically see in the winter months. We spoke with Dr. David Koons, a professor and Chair of Colorado State University's Wetland and Waterfowl Conservation program, to learn more about why these birds are appearing in different locations.

Mostly recognized as Canadian Geese, Dr. Koons says that were the misconceptions start. The species is technically Canada Geese.

While millions of birds migrate each winter, it's the larger-bodied birds that we can more easily see migrating that catch our attention. Canada Geese are larger birds, and store more fat, allowing them to only have to do a shorter migration and stay further north than the smaller-bodied birds that typically move towards more tropical climates.

"Snowpack over their food is a bigger push for them than temperature," said Dr. Koons. Though long stretches of cold days can freeze over water sources and force the birds to move, he added. Depending on their needs, the geese may move further north or south to follow some warmer temperatures.

Dr. Koons mentioned that scientists have noticed a trend of larger-bodied birds not migrating as far south as they used to because they don't need to. The frost line is moving further north, and birds don't have to trek as far south to find the resources needed to survive. Koons gave Louisiana as an example. "You're not seeing as many mallards as your grandparents did 50 years ago."

While Canada Geese aren't known for being very popular, they play an important role in recycling nutrients in an ecosystem, such as nitrogen. Dr. Koons says if you get enough Canada Geese together, it's like having a larger species like a cow or elk doing the same process of nutrient recycling, but in different ecosystems. He also added that since the geese are seasonal migrators, they benefit multiple different ecosystems throughout the year.