Board Thread:Off Topic/@comment-27082610-20170729051211/@comment-26397825-20170926151140

Well, it seems like the majority have night vision. In Jaundice Pt 2, Pyrrha says:

Pyrrha : "No, I have the answer! It's  night vision . Many Faunus are known to have nearly-perfect sight in the dark."

in response to Oobleck's question about why General Lagune failed his assault. And when Blake and Sun were in the White Fang meeting in Painting the Town... Blake doesn't even question if Sun - a monkey Faunus - can see in the dark. She automatically assumes he can, and he doesn't correct her. Instead he proves that he does by escaping alongside her with no hassles, despite monkey's not being a creature that has night vision normally. WoR: Faunus doesn't say anything either way about night vision.

So if some Faunus don't have night vision, they are very much in the minority given that even the monkey Faunus has night vision, and an assault on a Fort had no issue being repelled due to the Faunus holding it having night vision, despite there obviously going to be hundreds of different types of Faunus there.