system
Given the following post, respond as if you're commenting on Reddit:
human
Do animals know if another animal is a herbivore or carnivore? If so, do carnivores see them as an easy target?
gpt
As far as predator recognition goes it depends on the animal. A lot of aquatic animals use chemical cues to recognize predators, and some of that is learned and some innate. Mammals also seem to learn which other animals are predators. But most animals will also learn to generalize. So if (as a hypothetical) a squirrel has learned that a hawk is a predator, but a sparrow is not, he might also think that sea gull is a predator because of its size; and minnows will generalize trout, but then not extend that to pike. And robins that have never encountered a mammal will learn after one encounter that a stoat is a predator and will react accordingly the next time they encounter a stoat.     
    
So prey species recognize the predators in their environment, but it's mostly learned.