1. Reptiles

2. 1. Reptiles Cold-blood vertebrates Dry, scaly skin
Lay eggs with leathery shells
Three chambered heart
Live in wet or dry climates
Born with lungs and maintain through life

3. 2. Categories of Reptiles
Non-Living: Dinosaurs
Living:
(a) snakes and lizards
(b) alligators and crocodiles
‘(c)’ turtles,
(d) tuatara (single species in New Zealand)

5. 3. Snakes No legs, no ear openings, and unmovable eyelids
Molting – shed skin (and eyelids) periodically
Most are non-poisonous
Found in many different types of environments

6. 3. Snakes

7. 4. Snake Senses Can not hear and have poor vision
GREAT sense of smell (use tongue)
Heat detecting organs (sense prey)

8. 5. Snake Snacks Meat eaters Swallow food whole
Live or strangle/suffocate and eat dead
Jaws become unhinged; throat is elastic

9. 6. Lizards

10. 6. Lizards Four legs, ear openings, and movable eyelids
Shed skin periodically via molting
Most live in warm/hot and dry places
Chameleons, Komodo (310 lbs), iguanas, flying lizards

11. 7. Crocodiles and Alligators
Found in shallow waters in tropical climates
Use tails to propel through water
Nostrils and eyes above water
FOUR chambered hearts

12. 8. How to tell the difference?
Alligators – broad, rounded snouts
Crocodiles – narrow, pointed snouts; also, fourth tooth on the lower jaw is outside the upper jaw when mouth is closed

13. 7. Crocodiles and Alligators

14. 9. Turtles Most have clawed legs (sea turtles-paddle shaped)
Two hard, bony shells that cover body
Vertebrae and ribs are part of shell
Some can pull head and legs inside of shell

15. 10. Types of Turtles
Sea Turtles – live in the ocean

17. 10. Types of Turtles Sea Turtles – live in the ocean
Tortoises – live entire lives on land

19. 10. Types of Turtles Sea Turtles – live in the ocean
Tortoises – live entire lives on land
Terrapins – freshwater turtles which may venture onto land