Do you mean:
* Animals commonly found in a specific location? (e.g., common animals in a forest, in a city, in a particular country)
* Animals common to a particular species? (e.g., common house pets, common livestock, common wild animals)
* Animals common in terms of population size? (e.g., the most populous animals on Earth)
* Animals that are generally well-known or easily recognized? (e.g., common animals in children's books, common animals in movies)
Once you tell me what you are looking for, I can help you find the answer!