The double crowned cormorant (Phalaclocoraxauritus) is a bird species in the family Scomorantidae of the order Characiformes. Its beak is strong and long, with grooves on both sides of the upper beak and a hook at the tip, making it suitable for pecking at fish; There is a laryngeal sac at the base of the lower mouth; Small nostrils, completely concealed in adult birds; Expose your eyes first; Slender neck; Two wings of moderate length, lacking a fifth secondary feather; The tail is round and hard straight, with 12-14 tail feathers; The feet are located at the back of the body; Short tarsus without feathers; Flat toes, long hind toes, connected by webbing. After diving, the feathers are soaked and need to spread their wings to dry in the sun before they can fly. Residing on islands, coastlines, and swampy areas. They mainly eat fish and crustaceans.