Some animals burrow into the ground, letting air and water reach plants' roots. Others build nests in which to raise young. When they're grown, other animals can reuse the nest. Ecosystem Architects: Animals Building Incredible Structureslooks at how animal builders make the world a better place, as well as the threats they face and how people can protect them. 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.