Two points: 1) For animals, the two forms of art are singing and dancing.
2) Some animals know that what’s happening is art.
No complex thoughts, no writing, no social concepts,
perhaps no family concept, even no understanding of development.
Prehistoric artists knew: I am an artist. But that’s all. Others are not.
Just like some birds, even if they are not the same species, or some dogs, who understand music being played.
They don’t understand what’s happening in our minds, but they know there is an intelligent being in front of them.
One who is doing something different from instinct.
Animals sing because they know it’s music.
This is not a painful scream, nor an expression of anger.