A GREBE is a type of diving waterbird that is characterized by its lobed toes and dense plumage. It is a relatively small bird, usually ranging from 10 to 24 inches in length. Grebes are found in many parts of the world, including North America, Europe, Asia, and Africa. They are excellent swimmers and divers, and can stay underwater for up to two minutes at a time. Grebes feed on fish, crustaceans, and aquatic insects. They are also known for their elaborate courtship displays, which involve swimming, diving, and shaking their heads.