In late 2013, snowy owls started showing up in unlikely places, like Florida, . What caused these birds to leave their Arctic home? Markle explains the story behind the owls' unusual behavior in the winter of 2013-2014 and presents the science behind this "irruption" of owls. Full color.

Sandra Markle is the author of numerous award-winning books for children. A former elementary science teacher, she is a nationally-known science education consultant. Markle has received many honors for her series Animal Predators, Animal Scavengers, and Animal Prey. Several titles have been named as National Science Teachers Association (NSTA)/Children's Book Council (CBC) Outstanding Science Trade Books for Students K-12, and Animal Predators was honored as a Top 10 Youth Nonfiction Series by Booklist.
Over 500 schools participate in Markle's Book Explorers program which provides free resource-packed emails and classroom activities. Markle lives in Lakewood Ranch, Florida with her husband, photographer Skip Jeffery.