GREBE is a family of aquatic birds that includes four species: the DIDAPPER (8 letters), DABCHICK (8 letters), LOON (4 letters) and DIVER (5 letters). The DIDAPPER is a small, freshwater diving bird found in Europe, Asia and Africa. The DABCHICK is a small, freshwater diving bird found in Europe, Asia and Africa. The LOON is a large, freshwater diving bird found in North America and Eurasia. The DIVER is a medium-sized, freshwater diving bird found in North America, Europe, Asia and Africa. All four species of GREBE are known for their ability to dive underwater for food.