I've been wondering lately, do animals invent names? As in names for themselves? Names for each other? I've always thought that what we do when we call ourselves "Ralph" or "Laura" is unique, something exclusively human. But it turns out that's wrong. Other animals have name-like calls that they use much like we do. I've posted about this before (regarding horses, dolphins and little parakeets) ...
... and now I've discovered a new one.