This question can be answered in a variety of ways, so I'd like to briefly highlight some of those various pathways for this answer.
Animals see humans exactly the way that you see humans because you, and all other humans, are classified as animals. There are 6 kingdoms of living things. Two of those kingdoms are bacteria. A third kingdom is protist. Then comes fungi. The plant kingdom is next, and since humans are not any of those kingdoms, we belong in the animal kingdom. You and I are both animals, so you could answer this question by explaining how you see humans yourself.
A different way to tackle this question is to discuss visual perception. A lot of animals have eyes, and those eyes contain photo-sensitive cells called rods and cones. Rods are sensitive of light and dark, while cones are color sensitive. Different animals have different ratios of rods to cones, so they see colors more (or less) vividly than you do. Regardless, some animals would see humans using the visible spectrum. Other animals are capable of seeing parts of the electromagnetic spectrum that humans can't see. For example, bees use parts of the ultraviolet spectrum, so they see humans in ways that humans can only imagine. Snakes can detect infrared radiation, so they see humans as combinations of temperature zones.
If this question is more philosophical in nature, then you could make an argument that some animals see humans as apex predators. Most animals shy away from humans in the way that prey species avoid anything that might kill them. Of course, there are plenty of animals that are quite capable of hunting down and killing humans. Sharks and polar bears are both good examples, so I believe that you could also safely say that some animals see humans as potential prey.
There is a final possibility as well. It is possible that animals do not think about humans in any way. We are something that exists and something to be completely ignored because we don't matter to animals. They will continue living their existence with or without human beings on the planet. This notion that nature simply doesn't care about humans in any way is a foundation of naturalism and is something that authors like Stephen Crane quite famously explored. Sara Teasdale's poem "There Will Come Soft Rains" is probably my favorite example of how nature and all of the animals flat out don't care about humans.
And not one will know of the war, not one
Will care at last when it is done.
Not one would mind, neither bird nor tree
If mankind perished utterly;
And Spring herself, when she woke at dawn,
Would scarcely know that we were gone.