A gecko is a small, lizard-like reptile known for its distinctive appearance and unique abilities. They are found in warm regions around the world and are known for their ability to climb walls and ceilings using specialized toe pads. Geckos are typically nocturnal and are often kept as pets due to their docile nature and interesting behaviors. They are also known for their ability to shed their tails as a defense mechanism, which can then grow back over time.