APN category says that wild animals refers to wild mammals only, so let's stick with that now. Remember only that wild doesn't mean they have to live in the nature, but that they are a natural species not a human bred veriety.
Photogrpahs don't have to be taken in the wild, but man made stuff and people should be avoided in the image and especially we don't wish to see bars in the zoo and such. Also, this is not a place for dead animals, not stuffed ones or similar.