The term GECKO is a type of LIZARD and REPTILE. It is a small to medium sized species of LIZARD found in warm climates throughout the world. Gecks are known for their ability to climb smooth surfaces and their vocalizations, which sound like a chirping or clicking noise. They are also known for their unique toe pads that allow them to cling to walls and ceilings. Gecks are harmless to humans and can make interesting pets.