When you walk or drive, you always have to rotate the map, looking for rare and epic dinos. You could walk by and few minutes some epic dino could spawn behind you and you don’t know about it until you rotate your map (that happend to me twice).
I suggest to add some blue or gold label if some rare or epic dino is in visible range, but you don’t look at it right now. It could be on the edge of the screen from that side, where to rotate the map to see the dino. So it would be easier to play riding the bike for example.
Something like this