Man, in contrast to other animals, is conscious of his own existence.  Therefore, conscious of the possibility of non-existence. Ergo, he has anxiety.”

Woman speaking at party, in Shadows, a film by John Cassavetes, 1959.

I am not convinced that man alone is conscious of his own existence, not when elephants go to specific places to die and other elephants avoid those places, nor when dogs play jokes on their owners, nor when octopodes exhibit an aesthetic sense, and nor when some birds seem to enter into relationships with humans to whom they present their offspring proudly as if to a grandparent.