Photographs: Stuart Wilson/Photo Researchers, Inc. (jumping stick); © Pete Oxford/naturepl.com (feather mimic caterpillar); © Hornbil Images/Alamy (drongo); © Zigmund Leszczynski/Animals Animals (African stumptail chameleon); © Morales/Age Fotostock (great potoo); Jez Tryner/imagequestmarine.com (crab); © Christian Ziegler (green caterpillar); Skip Moody, Rainbow/Science Faction (comma butterfly); © Cathy Keifer/Shutterstock (flower mantis).