Have hair or fur
Give birth to live young
Nurse with mothers milk
Have lungs and breath air
Ears stick out
Warm blooded

Have feathers and wings
Lay eggs
Have 2 legs
Ear holes instead of ears
Warm blooded

Breathe underwater
Live in water
Have scales and fins
Cold blooded
Lay many eggs

Have scales
Dry skin
Usually lays eggs, sometimes live young
Ear holes, not ears
4 legs or no legs
Cold blooded

Live on land
Webbed feet
Breath with lungs and gills
Cold blooded
Moist smooth skin
4 legs
Lay many eggs