Labels:text | screenshot OCR: DEFENSE BIRDS NEED to be light to fly, so they lack the heavy built-in defenses, such as horns or armor, developed by other animals. Instead, birds are instinctively cautious, and normally react to danger by flying away. However, ground-living species cannot always make a fast getaway. For them, camouflage forms a first line of defense. These three birds show how effective camouflage can be. RINGED PLOVER NIGHTJAR WOODCOCK