Most of the animals i found were inside of the red line.

I would recommend running around the edge of the red line over and over again to get more animals.

Pronghorn (Lots of it too)
Whitetail Deer
Caribou
Alpha Caribou
Cougar
Grizzly Bear

You can also find: Alpha Whitetail Deer, Seagull, Crow's (Obviously) and Rainbow Trout wich you can fish at the river end.

Take with Jess Black and another npc with a bow or a friend and you should be able to get lots of animals in a short amount of time.
Other hunters that you can sell to walks in this area aswell. Although they do get killed easly by Grizzly Bears and Cougars.