Canada Goose
Branta canadensis

Dark-breasted individual

Northerly Island, Chicago
Cook County, IL
22 & 25 November 2016

This dark-breasted Canada Goose was with a small flock of other Canada Geese that had the pale breasts that are typical of the geese seen in Chicago. I am wondering if this bird might be assignable to the occidentalis (Dusky Canada Goose) subspecies.