Snow Geese by Jonathan Stoke
This time of year (March through April), there are tens of thousands of Snow Geese moving through an area about 50 miles west of where I live at Fort Boise Wildlife Management Area. We see this major bird event every spring, but in the fall, we hardly see any Snow Geese. The first Snow Goose I ever saw was around Thanksgiving time in Scottsdale, AZ. This got me to wondering...which route(s) do Snow Geese take in the fall to head for warmer climes? I pulled together these eBird sightings maps, which range maps are only as comprehensive as there are eBirders submitting checklists across North America. We have enough data from 2003 through today in 2010 that we can detect some patterns. I added an orange border line to indicate general range during that month and a red border line to emphasize higher frequency reports, most likely revealing higher population densities of Snow Geese during that month.