Using the dichotomous key, we take the following steps:
1a Has a backbone
Go to 3
3b Does not have gills and scales
Go to 4
4a Lay eggs
Go to 5
5b Does not have feathers
Go to 6
6a Lays eggs in water
Go to 7
7a Does not have a tail
Go to 9
9a Has a lot of warty bumps
Is Bufo bufo (common toad)
