
Within the first few months of life, every bottlenose dolphin invents a unique whistle that becomes its name for the rest of its life — and other dolphins learn that whistle, remember it, and use it to call out to that specific individual, making bottlenose dolphins the first non-human species ever discovered to use personal names
The proposition that another animal species besides humans uses personal names was, for essentially the entire history of comparative animal cognition research before the 1960s, considered a category error.














