Colour is often used in startling 'deimatic' displays that have evolved to scare off predators. These combine warning coloration with behaviour. Many insects, including the Peacock butterfly (Inachis io) use a combination of coloration strategies for survival. The underside, presented when the insect is resting in vegetation with wings closed, is cryptic, being a leaf mimic. But if disturbed by a predator, the butterfly flashes its wings, displaying the conspicuous eyespots, and startling the predator to hesitate, increasing the butterfly's chances of escape.[24] Since the eyespots do not resemble any particular animal, the startle coloration and behaviour are not exactly mimicry. Butterflies with eyespots often survive predator attack for another reason also: birds typically attack the eyespots, not the body (see illustration).[25] Many noctuid moths, such as the large red underwing, Catocala nupta which are highly cryptic when at rest, display a startlingly bright flash of colours Ц combinations of red, yellow, orange, pink, black, and white Ц when disturbed. Similarly, some orthopterans such as grasshoppers are cryptic at rest, but flash bright wing colours including blue if disturbed. The moths then rapidly fly off; the grasshoppers jump, fly and glide, landing among cover and almost instantly 'disappear' as they fold their wings Orthoptera is an order of insects with paurometabolous or incomplete metamorphosis, including the grasshoppers, crickets, weta, and locusts. Many insects in this order produce sound (known as a "stridulation") by rubbing their wings against each other or their legs, the wings or legs containing rows of corrugated bumps. The tympanum or ear is located in the front tibia in crickets, mole crickets, and katydids, and on the first abdominal segment in the grasshoppers and locusts.[1] These organisms use vibrations to locate other individuals. Grasshoppers are able to fold their wings, placing them in the group Neoptera. Orthopterans have a generally cylindrical body, with hind legs elongated for jumping. They have mandibulate mouthparts and large compound eyes, and may or may not have ocelli, depending on the species. The antennae have multiple joints, and are of variable length.[1] The first and third segments of the thorax are enlarged, while the second segment is much shorter. They have two pairs of wings, which are held overlapping the abdomen at rest. The forewings, or tegmina, are narrower than the hindwings and hardened at the base, while the hind wing is membranous, with straight veins and numerous cross-veins. At rest, the hindwings are held folded fan-like under the forewings. The final two to three segments of the abdomen are reduced, and have single-segmented cerci