What is a synonym for animal?

Here are some synonyms for "animal", depending on the context:

General:

* Creature

* Being

* Beast

* Fauna

* Wildlife

* Brute

Specific:

* Mammal

* Bird

* Fish

* Reptile

* Amphibian

* Invertebrate

Informal:

* Critter

* Bug (for insects)

The best synonym will depend on the specific context of your writing.