Each spring, hundreds of thousands of horseshoe crabs crawl from the bottom of Delaware Bay to lay billions of pearly green eggs on the beaches. Their salty eggs provide a feast for scavenging coastal animals, but billions more are eaten by the flocks of shorebirds that stop to rest and feed each spring after flying north from their homes in South America. In recent years the horseshoe crab population has dwindled. In turn, the number of shorebirds that fly north each year has grown smaller. Illuminated with warm, detailed watercolors, Horseshoe Crabs and Shorebirds demonstrates the delicate relationship between these animals and is an excellent resource for ecology lessons, as well as a dramatic storybook for sharing. Author Victoria Crenson has explored the shoreline up and down the east coast of the United States from Maine to Florida. Her previous books include Birds of the World and Bay Shore Park: The Death and Life of an Amusement Park . She lives in Baltimore, Maryland. Illustrator Annie Cannon has illustrated a number of nature titles, including Tale of a Tadpole , The Bat in the Boot , and Ma Jiang and the Orange Ants . She lives in Portland, Oregon.