Incredible But True Incredible But True Human World History Makers Cities Of The World Art And Music Sporting Headlines Plant Life Fish, Amphibians, Reptiles Birds and Mammals Creepy Crawlies Marine Life Restless Earth Earth's Secrets Changing Weather Seas And Oceans Comparisons Amazing Structures Machines And Man World Of Inventions Travelling Around Mysterious Universe	Graveyard Haunts It is because most of us avoid graveyards at night that owls are often found there after dark. Owls hunt by sound and in the silence they can hear the rustling movements of their prey.   Previous: Back Book: Incredible But True Section: Incredible But True Chapter: Birds and Mammals