I saw it (not to the point where i need to find it yet) once around H-12/13 in wajaom- only time I've seen it despite leveling there for the better part of a week or so.
I found them once but didn't want to drop invis to check them as it seems the tigers are sight aggro and will chase you to death, I saw the horseman pics in killingifrit.com but don't know what the footprints are for yet.