A gecko is a small to medium-sized lizard belonging to the family Gekkonidae. They are known for their unique ability to climb smooth surfaces and even walk on ceilings, thanks to specialized toe pads that create adhesive forces. Geckos are found in warm climates around the world, particularly in tropical and subtropical regions. Geckos are primarily nocturnal and have excellent night vision, which helps them hunt insects and other small prey. They communicate using a variety of vocalizations and body language. Some species can also change color to blend into their surroundings, providing camouflage from predators.