Sharp beak straight wings, each side has a tenon. In the breeding season will have a longer tail than normal to 10 imaginable. Females are larger than males slightly. The long tail in the breeding season, the color of the mouth, legs and fingers is a gray sky, forehead and neck below white. I brown neck top and yellow black stripes. White wings cut with the color of the body top. And the bottom which are black, as it clearly found on inland waters.