The term 'Duck Features' can be summarized by the crossword solution 'Webfeet, ' which is a seven-letter word. Webfeet refers to the webbed feet of ducks, which are adapted for swimming and are an important feature of the duck species. Ducks have webbed feet that are made up of four toes connected by a thin membrane of skin, allowing them to move quickly through the water. This adaptation helps ducks to find food, escape predators, and migrate long distances.