Chameleons and treefrogs are very good at disappearing. The Katydid below easily disappears in full summer. This Katydid has adapted to mimic a leaf in both color and shape. Many prey animals have found ways to startle a predator and reduce their chances of being eaten. Some butterflies and moths flash eye spots on their wings, false eyes which suggest a much larger animal.
Some caterpillars play the same trick.
Another adaptation is Warning Colors . Many animals are brightly colored so predators will know they are poisonous or sting or just taste bad. Bees and wasps developed their bright yellow and black patterns to stay alive. Poisonous frogs want predators to notice them. Humans do this too.