 Frogs such as Physalaemus nattereri , Physalaemus deimaticus , and Pleurodema brachyops have deimatic behaviour . These animals inflate themselves with air and raise their hind parts to appear as large as possible , and display brightly coloured markings and eyespots to intimidate predators . Seven species of frogs in the genus Pleurodema have lumbar glands ( making the animals distasteful ) ; these glands are usually boldly contrasted in black as a further warning . 
