What about giving centaurs something like detect secret passage, but only in the wilds?

I saw at least one new secret passage (at least it's new for me) in the wilderness area where big centaur npc stands and wears full set of armors for centaurs.

So it could help centaurs to find such npc's centaurs. Overall it doesn't look too powerful and they are wild creatures by nature so they know wilds well.