I always thought, and probably not for the most solid reasons:
Math is applied philosophy and theory of knowledge.
Physics is Math applied on reality.
Chemistry is applied Physics.
Biology is applied Chemistry.
Math is applied philosophy and theory of knowledge.
Physics is Math applied on reality.
Chemistry is applied Physics.
Biology is applied Chemistry.
I've seen Susskind convincingly (albeit shallowly) argue that more "primitive" animals understand physics and I would be surprised if it was easy to argue that animals understand mathematics without circular logic or quick and loose definitions of what math is.