Bloodsucking Leeches (No Backbone! the World of Invertebrates)

Be careful the next time you go for a swim in a pond or lake. There might be a hungry leech lurking below the surface! This creature has a favorite meal—fresh blood. A leech uses the special suckers on each end of its body to drink the blood of living animals—including humans! These are just some of the fascinating facts children will discover as they explore the strange and unusual  world of this creepy crawler.