Horses:
Horses are very intelligent animals and they also tend to be pretty skittish. It's important to know how to approach, act, and interact wiht a horse so that you don't scare it.
Horses have very good peripheral vision, like most prey animals. They can see behind them without having to turn their heads. However, having great range of vision does not prevent them from having blind spots. A horse's blind spot is directly in front of it.
This list of things will teach you what you should do and what you shouldn't do when you interact with a horse.