Careful there with the phrasing. When we talk about animals communicating we generally mean animals using signals (e.g. to indicate the presence of a predator or a source of food). I'm not aware of any reliably documented case of animals communicating abstract concepts.

There is some research with great apes that makes the rounds every now and then but the findings are dubious at best as there's a lot of conflict of interest, handwaving and wishful thinking (see Koko "mourning" when told that Robin Williams died because they met once at some point in the past).

EDIT: Also it's probably a good idea to limit the conversation to social animals. Solitary animals don't have much use for communication other than challenging the competition and impressing potential mates -- insert celebrity joke here.