You are not protected from the deer wandering around
They want to kill you, but disappear immediately if they are noticed /j
Viewing post in [CONTAIN SOME SPOILER I think] Ambience mode safety
I haven't played this mode, but I think there is another creature that can wander around at night. And it is also harmless, like deer, and even very timid. It can scare you with just its appearance.
I was joking about the killer deer, by the way. They just wander around and disappear when you approach them.