The term 'long-eared mammal' can be broken down into two crossword solutions: HARE (4 letters) and ASS (3 letters). Hares are a type of mammal that belong to the same family as rabbits, and they are characterized by their long ears and powerful hind legs. Asses, on the other hand, are members of the horse family and are known for their long ears and sturdy build. Both animals are found in many parts of the world and are important to their respective ecosystems.