Many invertebrates, including ants, monarch butterflies, and corals, find strength in numbers. Some work in large groups to build homes, gather food, and protect their young. Others come together to stay warm or reproduce safely. Invertebrate Groups explores how and why different invertebrate species form groups. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, infographics, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards. Core Library is an imprint of Abdo Publishing, a division of ABDO.