Chimp communication is complicated enough that it can probably be called conservation, but I think they're one of the only species for which that is true.

I think most animals lack a wide enough range of responses to have a conversation.

In most cases humans have not yet figured out anywhere near the full range of particular animals’ communication, so this is hard to judge.

For example, prarie dogs https://www.nytimes.com/2017/05/12/magazine/can-prairie-dogs...