Vertebrates or Chordates:

Chordates bodies are supported by a stiff rod which is called a notochord.

Amphibians:
Are cold-blooded, soft-skinned animals which live on land and in water examples of these are toads, frogs and newts.

Birds:
Birds are warm-blooded, egg-laying animals which have wings and feathers, but not all birds can fly, there are so many types of birds that you could find in a field it would take a very long time and a massive website to cover them.

Fish:
Fish are animals that live in water. They have scales and fins to swim with and have gills to breathe with - you won't find any of these in a field.

Mammals:
Mammals are warm-blooded creatures.  They suckle their young animals with milk. The following are types of mammals:

Canines:
All types of dog and dog-like mammals. Such as wolves, German Shepherd - these don't occur naturally in our fields.

Felines:
All types of cats and cat-like mammals. Such as tigers, tabby cat - these don't occur naturally in our fields.…

Primates:
Primates are monkeys or apes which have hands and feet which grip. They are the closest relative to the human - we are the only example likely to be in a school field.

Rodents:
Rodents are mammals with long front teeth which are good for gnawing, like mice and moles.

Vulpes:
All types of foxes.

Reptiles:
They are scaly, cold-blooded creatures which lay eggs on land. Examples of reptiles include Grass Snake, Adders and Smooth Snakes.