Presentation on theme: "A cold-blooded vertebrate of a class that includes snakes, lizards, crocodiles, turtles, and tortoises. They are distinguished by having a dry scaly skin,"— Presentation transcript:
A cold-blooded vertebrate of a class that includes snakes, lizards, crocodiles, turtles, and tortoises. They are distinguished by having a dry scaly skin, and typically laying soft-shelled eggs on land
Hard Shell (usually) Carapace and plastron Oviparous Internal fertilization Often times lacking teeth
Largest order of reptiles (more than 6000 species) Loosely hinged jaw Skin is shed May be limbless Found all over the world!
Snakes are elongate, legless, carnivorous reptiles of the suborder Serpentes that can be distinguished from legless lizards by their lack of eyelids and external earscarnivorous reptileslegless lizards Paired organs are usually found one in front of the other One functional lung
Smell the air with their forked tongue Lack chewing teeth and must swallow prey whole May or may not be venomous How can we tell?!
VenomousNon-Venomous 4 nostrils (2 are pits) Fat broad bodied Broad spade shaped heads (triangle) Slited pupils 2 nostrils Head is about the same width as the body Round pupils
Eastern Hognosed Snake Heterodon platirhinos
Water Moccasin Agkistrodon piscivorous
Queen Snake Regina septemvittata
Lizards typically have feet and external ears, while snakes lack both of these characteristics. However, because they are defined negatively as excluding snakes, lizards have no unique distinguishing characteristic as a group.
Can have well developed color vision Use a combination of body colorations, body positions and pheromones to communicate.
Eastern fence lizard Sceloporus undulatus
Five lined skink Eumeces fasciatus
Alligators, Crocodiles, Gharials, and Caiman Closest relation to birds Belly walk or more upright run for a period of time