Elephants give each other names – first non-human animals to do so, study claims

There is a mention of dolphins in the article: "This makes them [elephants] the first non-human animals to address each other in a manner that does not imitate the receiver's own call, as dolphins and parrots do."

Remove non-humans. “First animals to do so.” Wait… that’s not correct, because humans are animals and they name each other. You’ve created a false dichotomy.

Humans are animals. There are no humans that are not animals. Non-human animals are animals which are not humans, and thus the headline is gramatically and scientifically correct. It is unclear what you are trying to achieve by this comment.

It happened in prehistory along with the first language developments, but archeologists are keeping track of the oldest known name: https://en.wikipedia.org/wiki/Kushim_(Uruk_period)