To help me figure out what animals you're asking about, tell me:
* Is this a fictional forest from a book, movie, or game? If so, tell me the name of the story!
* Are you thinking of a specific type of forest? (e.g., a rainforest, a temperate forest, a desert forest)
* Are you looking for animals that are good at camouflage?
Once I have more information, I can give you a better answer!