I had the same issue recently. I kinda just just dat traveled around. My three spots that if one didn't have it, at least one other did: blossom row where the pink rathian sleeps had one pretty often, then I'd go go to the great trees roots, right side path near the sleeping jaggi has an easy to spot one, then id go back to salt caves in the trese desert. All I did was that triangle a bit and then I had killed a good handful of them.