Male Anhinga (Anhinga anhinga) during breeding season, showing dagger-like bill - stock photo

male Anhinga (Anhinga anhinga) during breeding season, showing dagger-like bill. The male acquires pale wispy plumes on the upper neck and the bare facial skin is brightly colored. Anhingas are highly efficient swimmers that feed primarily on fish which they frequently spear with their dagger-like bills, and are frequently seen drying out their feathers on a perch after swimming in the water. Freshwater wetlands. Everglades National Park, Florida.