Den trees are used by animals that need cavities to reproduce, such as woodpeckers, raccoons, and squirrels.
(Den trees; are used; by animals that need cavities to reproduce, such as woodpeckers, raccoons, and squirrels) (animals; need; cavities; to reproduce)
Den trees animals
are used need
by animals that need cavities to reproduce, such as woodpeckers, raccoons, and squirrels
cavities to reproduce