This title takes readers to narwhal habitats to understand why narwhals are at risk, what humans are doing to make matters worse, and the ways humans can help to save narwhals ultimately, Earth. Sidebars, maps, and a glossary enhance readers' understanding of this topic. Additional features include a table of contents, an index, and a fact sheet. Aligned to Common Core Standards and correlated to state standards. Checkerboard Library is an imprint of Abdo Publishing, a division of ABDO.