Fairly large duck with extensive range across Northern Hemisphere. Males are mostly gray with a black rear end and puffy head. Also look for small white wing patch in flight. Females are similar to Mallard, but note thinner bill, plainer face, orange line along the edge of the bill, and white wing patch in flight. Typically found in pairs or small flocks in shallow wetlands, ponds, or bays, sometimes mixed with other species of ducks.