I did the bear bestiary in the bear "cave" near amazon camp (a bit north west)...
why i west).
Why I did in this place? Because at the same time I did the poacher + hunter bestiary in the cave a bit to the west (tynusiiaa (Tynusiiaa showed that cave) so i did bear+poacher+hunter I did Bear+Poacher+Hunter all on firebombs... good luck
P.S.: It was rapid respawn