1. Unit 9 Chapter 31 Reptiles and Birds

2. What is a Reptile?
Ectotherms with dry, scaly skin, with claws on their toes
More advanced 3 chambered hearts

3. What is a Reptile? Amniotic eggs
Allows reptiles to be successful on land

4. Diversity of Reptiles Turtles and tortoises Crocodilians
The only Reptiles with hinged shells
Crocodilians
The only Reptiles with chambered hearts

5. Diversity of Reptiles Lizards Snakes
Includes the largest lizard, the Komodo Dragon
Snakes
Includes rattlesnakes, copperheads, water moccasins, & coral snakes

6. Diversity of Reptiles Snakes feed in a variety of ways:
Constrictors kill prey by suffocation
Venomous snakes kill prey by poisoning
Most snakes simply grab prey and swallow it whole

7. Diversity of Reptiles Reptiles have special sense organs:
“Pit” of rattlesnakes allows them to detect heat of warm-blooded prey
Jacobson’s organ in roof of snakes mouth allows them to detect odors brought in by forked tongue

8. What is a Bird? Class Aves
Feathers, modified scales that provide insulation & flight
Wings, power provided by muscles attached to sternum (breastbone)

9. What is a Bird?
Other adaptations for flight include hollow bones, high metabolism maintained by 4 chambered heart & air sacs
Endotherm, maintains a nearly constant body temperature that does not depend on environment

10. Diversity of Birds
A bird’s lifestyle is determined by its type of beak and feet.