Crypsis is a phenomena where an organism's appearance allows it to blend well into its environment. Caterpillars that appear like catkins and moths that look like bark are two examples. The striking caterpillar of the Emperor Gum Moth A caterpillar is the larval form of a lepidopteran (a member of the insect order comprising butterflies and moths). ... A male catkin on a willow Catkins, or aments, are slim, cylindrical flower clusters, wind-pollinated and without petals, that can be found in many plant families, including Betulaceae, Fagaceae, Moraceae, and Salicaceae. ... A moth is an insect closely related to the butterfly. ... BARK (Binär Automatisk ReläKalkylator) was completed in February 1950 at a cost of 400. ...

Crypsis is usually most effective when an animal is still. If it forages during daylight, cryptic animals may be sit and wait predators, taking advantage of the fact that they blend into their background. Alternatively, crypsis may be important while the animal is inactive, and it may be more of an active predator in darkness.