The calendar says it’s spring, but it still looks like winter at Chautauqua National Wildlife Refuge in Illinois. The snow and fog glow in the purple gloom on this April morning. Despite the chill, the wetlands, forests and prairies of the refuge are great places to see migrating waterfowl and shorebirds. Listen for their calls in the morning. Photo by Mitchell Baalman, U.S. Fish and Wildlife Service.