And I who though only Octopuses and Chameleons could change color at will...
In 2006 a snake that changes colors like a chameleon was discovered in the heart of Borneo. It's color changing abilities was discovered when a scientist put it into a dark bucket, and when he went to retrieve it a few minutes later, it was almost entirely white.
The scientists named it the Kapuas mud snake, since the two specimens they collected was found in the wetlands and swamped forests around Kapuas River.
The Kapuas mud snake is poisonous and is believed to live only in the area around Kapuas River.