The northward waterfowl migration coincides with the thawing of refuge ponds in late February. Tundra swans, Canada geese, and ducks stop on the refuge to rest and feed while other birds begin their courtship displays. Among the most spectacular displays are snipe "winnowing" and ruffed grouse "drumming." By late spring, waterfowl, bald eagles, osprey, and songbirds are nesting. Occasionally a visitor may be fortunate enough to see a black bear, a moose or an elk. Three species of hummingbirds can be observed zipping around the native plant gardens.