Not a lot to go on is putting it lightly.

[since "anything unusual" could come from something as innocuous as an animal traveling somewhere it wouldn't normally go, or it could be linked to the incident that happened here. But that's fine; if there is something he can notice from up high, Revali is confident he'll be able to notice it.]

You start walking that way, I'll take the upper path. Just shout if you need something.