Vertebrates (animals with backbones)
Group
|
Features
|
Examples
|
Fish
( 31 000 species)
|
| |
Reptile
(7 000)
|
|
|
Bird
(10 000 species)
|
|
|
Mammals
( 5 500 species)
|
|
|
Amphibians
(7 000) species)
|
|
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