Jackson's Chameleon

Jackson's Chameleon are creatures mentioned throughout the Fallout Series.

Background
The creature was originally native to East Africa, but was introduced to the United States in the 1970s. Genetic engineering and gene splicing of the creature with mixed-animal stock was used by the U.S. Government to create Deathclaws, as a means to replace soldiers in combat.

MacCready mentions Deathclaws being Jackson's Chameleons, questioning how they got so big. Joseph at Vault 13 notes that Deathclaws are "mutated Jackson's Chameleons" of the "horned variety." The creature's DNA was used alongside the American Alligator in an attempt to create Gatorclaws.

Appearances
Jackson's Chameleon are mentioned in Fallout 2, Fallout 4, Fallout 76 and Fallout: The Roleplaying Game.

Behind the scenes
Jackson's Chameleon is a real world animal of the same name.