Video answer: Hunting the legendary moose & legendary fishing! red dead redemption 2 legendary animals [rdr2]
Top best answers to the question «What is the white question mark when hunting legendary animal»
When you're in the same general area as a Legendary animal you'll get an in-game notification. From there, you should see a white question mark on the map if you're in Eagle Eye Mode that points you in the right direction.
Video answer: Legendary white bison rdr2 legendary animals location & rewards