These golden butterflies were literally in the spot my Rover is currently standing at in this picture.
That was their starting point.
But instead of just making a straight line for that rock in the distance, they make me cross the river to the left and then back again.
I hate this shit. Pure time-wasting busywork. Worse, there is no indicator on the map telling us where they are, so if you see one, you have to immediately do them or else you'll forget and the game will never remind you.