The Jacky Dragon, Amphibolurus muricatus, is a type of lizard native to Southeastern Australia. It was one of the first Australian reptiles to be named, originally described by English zoologist George Shaw in Surgeon-General White’s Journal of a Voyage to New South Wales, which was published in London in 1790. It is well-known for its bright yellow mouth and well-developed vertebral crest as well as the temperature-dependent sex determination of its offspring. Other common names include blood-sucker, stonewalker, and tree dragon.