Perhaps I'm old school ( or perhaps warped :) but I do divide animals into predators and prey ( at least in pairwise relationships ) . The salient difference is

Perhaps I'm old school ( or perhaps warped :) but I do divide animals into predators and prey ( at least in pairwise relationships ) . The salient difference is exactly what you describe. There are, of course, animals that are neither but they're fewer in number. Police are "front-eyed".