Ousters are a type of bird known for their unique adaptations to aquatic environments. They belong to the family Phalacrocoracidae and are often found near coastlines, lakes, and rivers. Ousters are excellent divers, using their webbed feet to propel themselves underwater while hunting for fish and other aquatic prey. These birds are characterized by their long necks, slender bodies, and sharp beaks, which help them catch their food. Ousters typically have dark plumage, which can vary among species. They are social animals, often seen in groups, and are known for their distinctive drying behavior, where they spread their wings to dry after diving.