The Dendrophidion crybelum, or crystal tree snake, is a vibrant green arboreal snake native to the tropical rainforests of Costa Rica and Panama, characterized by its striking yellow and black markings, agile climbing abilities, and diet consisting mainly of small mammals and lizards. This species plays a vital role in its ecosystem by regulating prey populations and serves as a food source for larger predators, while currently being classified as of Least Concern by the IUCN.