"What do mourning cloak butterflies have in common with pixie frogs and yellow-bellied marmots? They all estivate, or sleep through summer. Everyone knows about hibernation, but this book by award-winning author Melissa Stewart offers young readers a lyrical look at its fascinating warm-weather counterpart--estivation. Beautiful watercolor illustrations by Sarah S. Brannen reveal a wealth of details about each animal. Discover how some creatures survive by snoozing through the hottest days of the year"--From the publisher's web site.