The crossword solution for the term 'ospreys' kin' is ERNS. This is an abbreviation for the family of birds known as erns, which includes ospreys. Ospreys are large fish-eating birds of prey that live near water and have a distinctive white head and brown body. They are found on every continent except Antarctica and are known for their impressive aerial acrobatics. The erns family also includes other species of birds of prey such as the African fish eagle, the bald eagle, and the white-tailed eagle.