Camouflage

The peacock flounder fish can change its pattern and colors to match its environment. It is so skilled at camouflage that it can imitate a chessboard if rested on top of it.

Peacock flounder. By Brocken Inaglory,

Some species of chameleons can change the color of their skins for camouflage, or to signal mood to other chameleons. This is caused by stress and changes in the intensity of light and temperature, which alter the dispersal of pigment granules in the layers of cells beneath the outer skin.

After Dolwyddelan Castle was captured in January 1283 by English forces led by Edward I, the new garrison was equipped with winter camouflage of white material and stockings. This was done to help the soldiers blend in with the snow and ice, making them more difficult for the Welsh to see.

The use of winter camouflage was a common practice in medieval warfare. It was especially useful in mountainous areas, where the snow could provide excellent concealment.

The French Army was the first to use camouflage in 1915 during World War I.

Some 700 Lancaster bombers were built at the Avro "shadow" factory next to Leeds Bradford Airport (formerly Yeadon Aerodrome) during World War II. To avoid German bombing, an elaborate camouflaging operation took place, grass covering the roof and hedges made out of fabric to replicate the original field pattern. Dummy animals were moved daily to increase the camouflage.

Camouflage does not work on color-blind people and for this reason some were picked as snipers.

it is illegal for civilians to wear camouflage clothing in at least 18 countries, including Jamaica, Saudi Arabia, South Africa, and the Philippines.

Wearing camouflage clothing on safari in Tanzania is illegal.