Types of Animals

Characteristics

Cold blooded

Scales

Lay eggs

Number in species

Approximately 10,000

Facts

Have backbones

Discovered 320 million years ago

Characteristics

Cold blooded

Scaleless skin

Lay un-shelled eggs

Number of species

8,000

90% are frogs

Facts

Absorb water and oxygen though skin

Characteristics

Fur

Warm blooded

Milk fed

Number of species

5,000+

Facts

Oldest record mammal was 211.

Characteristics

No backbone

Subtopic

Number of species

over 1 million

Facts

665 million year old fossils found