Overall color can be tan, gray, brown, or reddish brown. Males court females by bobbing their heads and doing pushups. Scientific Name: Sceloporus undulatus. Adults range in size from four to seven inches, even though other members of its family in other parts of the world may reach 72 inches in length. The northern fence lizard belongs to a group of lizards commonly known as "spiny lizards." This way the young can grow before the first frost.As predators, these lizards help decrease populations of many insects that are pests or annoyances to humans. *LIVE ANIMALS WILL BE SHIPPED BY FED EX OVERNIGHT SHIPPING. Some are huge, some are small, and virtually all are amazing to observe in captivity. Color varies with sex. We offer exotic reptiles for sale online at absolute rock-bottom prices, which means we make these fascinating animals available to you affordably as pets, or even to start your own reptile breeding project. They usually have moist skin, lack scales or claws, and are ectothermal (cold-blooded), so they do not produce their own body heat the way birds and mammals do.