Thousands of waterfowl and other birds are headed south for the winter, which means the eastern half of South Dakota is a prime area for viewing and photographing giant flocks right now.
I found this large flock of snow, blue and Canada geese just west of the tiny town of Hetland last Saturday. Hetland is west of Brookings and in a north-south corridor of many glacial lakes that stretch to the North Dakota border. The geese tend to congregate near water, but also feed in the remnants of harvested corn fields.
Hotspots for viewing the migration are Waubay National Wildlife Refuge near Webster and Sand Lake National Wildlife Refuge northeast of Aberdeen.