Reviewed and recommended for the 4-H National Collection. Learn about the diverse would of aquatic invertebrates-their life histories, adaptions to habitats, and connections to aquatic food webs in streams, lakes and ponds, this guide is filled with detailed illustrations and little-known facts that are sure to interest and entertain young ecologists and anglers. Designed for adults to use themselves or with youth aged nine and older. Leader’s guide, activities, references, and instructions for building sampling equipment are included.