Are they warm-blooded? |
yes |
no |
no |
no |
yes |
Are they cold blooded? |
no |
yes |
yes |
yes |
no |
Do they have fur or body hair? |
yes |
yes |
no |
no |
yes |
Do they have feathers and wings? |
no |
yes |
no |
no |
yes |
Do they have fine and scales? |
no |
yes |
no |
yes |
no |
Do they have dry skin and scales? |
yes |
yes |
no |
no |
yes |
Do they have damp, smooth skin? |
no |
no |
yes |
yes |
no |
Do they lay eggs in water? |
no |
yes |
yes |
yes |
no |
Do they lay eggs on land? |
yes |
yes |
no |
no |
yes |
Do they have live babies? |
yes |
no |
no |
no |
no |
Do they feed their babies with milk? |
yes |
no |
no |
no |
yes |
Do they breathe with lungs? |
yes |
yes |
yes |
no |
yes |
Do they breathe with lungs and gills? |
no |
no |
yes |
no |
no |
Do they breathe with gills? |
no |
no |
no |
yes |
no |