Would be a cool update to add mythological/rumoured animals to maps, based on local legend or folklore.
For example , in Australia, we have the elusive Australian Black Panther, many sightings, shaky footage but no direct evidence it's there. But it persists as an Australian legend.
In New Zealand they introduced Moose for hunting waaaaay back, but they never took. While none have been sighted for decades in NZ there is still "sightings" and occasional evidence shows up to suggest there are still living there somewhere.
I'm sure a little digging for most maps/conutries would reveal similar folklore/legends surronding animals not native to the area. Adding one per map, or every 2 or 3 games would be an awesome addition, plus makes a great trophy objective idea.