There’s no getting around the fact that “mundane” beasts are (should be) difficult adversaries for folk, capable of killing or running off a party of adventurers.
Has anyone put together a list of mundane beasts, such as bears, boar, wolves, lions, and mountain lions? If so, would you be willing to post the info?
Agree. Give me some time and I’ll propose some cool beasties.
Stay cool 
Gorilla
Big jungle dwelling herbivore primates closely related to humans.
Might: 4 Nature: 6
Descriptors: Climbing, Rearing Youngs, Protecting the Troop
Conflict Dispositions---------------Conflict Weapons
Kill: 9----------------------------------Kill Weapons
[INDENT][INDENT][INDENT][INDENT][INDENT]+1D Attack, Crushing Hands
+1s Defense, Territorial
+1D Maneuver, Faster than it looks[/INDENT][/INDENT][/INDENT][/INDENT][/INDENT]
Drive Off: 12--------------------------Drive Off Weapons
[INDENT][INDENT][INDENT][INDENT][INDENT]+1D Attack, Crushing Hands
+1s Defense, Territorial
+1D Maneuver, Faster than it looks[/INDENT][/INDENT][/INDENT][/INDENT][/INDENT]
Flee: 3---------------------------------Flee Weapons
[INDENT][INDENT][INDENT][INDENT][INDENT]+1s Defense, Territorial
+1D Maneuver, Faster than it looks[/INDENT][/INDENT][/INDENT][/INDENT][/INDENT]
Capture 6-----------------------------Capture Weapons
[INDENT][INDENT][INDENT][INDENT][INDENT]+1D Attack, Crushing Hands
+1s Defense, Territorial
+1D Maneuver, Faster than it looks[/INDENT][/INDENT][/INDENT][/INDENT][/INDENT]
Instinct: When a stranger enters our territory, crush to death.
Special: Gorillas can’t use the Territorial weapon outside it’s territory. Three or more gorillas add 1 extra point to the total disposition in kill, drive off or capture conflicts.
Taken from my BWR gorilla.
Bear
Beaaaaaaaaaaaaar!
Might: 4 Nature: 6
Descriptors: Eating, Roaming the Woods, Roaring
Conflict Dispositions---------------Conflict Weapons
Kill: 12---------------------------------Kill Weapons
[INDENT][INDENT][INDENT][INDENT][INDENT]+2D +1s Attack, Rending claws
+1D Defense, Thick hide[/INDENT][/INDENT][/INDENT][/INDENT][/INDENT]
Drive Off: 9---------------------------Drive Off Weapons
[INDENT][INDENT][INDENT][INDENT][INDENT]+2D +1s Attack, Rending claws
+1D Defense, Thick hide[/INDENT][/INDENT][/INDENT][/INDENT][/INDENT]
Flee: 6---------------------------------Flee Weapons
[INDENT][INDENT][INDENT][INDENT][INDENT]+1s Attack, Pretty fast too
+1D Maneuver, Good sense of smell[/INDENT][/INDENT][/INDENT][/INDENT][/INDENT]
Trick 3---------------------------------Trick Weapons
[INDENT][INDENT][INDENT][INDENT][INDENT]+1D Maneuver, Good sense of smell[/INDENT][/INDENT][/INDENT][/INDENT][/INDENT]
Instinct: Always drag my prey back to my lair before eating it.
Special: Bear hug: If a character of lesser Might is eliminated from a kill, drive off or capture conflict by a bear, the character automatically suffers the injured condition. If already injured, no condition is earned.
A downgraded version of Petersen Bestiary’s Owlbear.
Housecat
That fluffy pet that you love so much
Might: 7 Nature: 8
Descriptors: Demanding, Ignoring You, Doing Ninja Tricks
Conflict Dispositions---------------Conflict Weapons
Drive Off: 4---------------------------Drive Off Weapons
[INDENT][INDENT][INDENT][INDENT][INDENT]+2D Defend, “But I want to stay on your lap!”
+1D Feint, “I said I want to stay on your lap!”[/INDENT][/INDENT][/INDENT][/INDENT][/INDENT]
Flee: 16-------------------------------Flee Weapons
[INDENT][INDENT][INDENT][INDENT][INDENT]+1s Attack, Dexterity of the cat
+2D Maneuver, Dexterity of the cat
+1D Feint, Sneaky[/INDENT][/INDENT][/INDENT][/INDENT][/INDENT]
Convince 16--------------------------Convince Weapons
[INDENT][INDENT][INDENT][INDENT][INDENT]+2D Attack, Cat’s gaze
+2s Defense, “Whatever, human”
+1D Maneuver, Cat’s gaze
+1s Feint, Purr[/INDENT][/INDENT][/INDENT][/INDENT][/INDENT]
Trick 8---------------------------------Trick Weapons
[INDENT][INDENT][INDENT][INDENT][INDENT]+2D Attack, Cat’s gaze
+2s Defense, “Whatever, human”
+1D Maneuver, Cat’s gaze[/INDENT][/INDENT][/INDENT][/INDENT][/INDENT]
Instinct: Always enslave lesser mortals
Special: Heat seekers: some people say that cats are great at finding sources of heat. Bulls**t, they want your soul. If you spent a night at a cat’s domain test Will Ob 4, suggested twist: your soul is his now.
Only Chaotic characters may start a Kill conflict with a cat.
Stay cool
Here’s one I just used in a game:
Rock Snake
The rock snake grows to a length of ten feet and lives among tumbled rocks, scrubland or grassy desert. It has a mottled gray-brown pattern on its back and sports a dangerously venomous bite. It is fast-moving but prefers to employ its camouflage for both offense and defense when possible. It has a Might score of 1 despite its large size because it has powerful weapons but is primarily a threat to unprepared or careless adventurers.
Descriptors: Vicious, Swift, Slippery
Might: 1
Nature: 4
Conflicts:
Drive Off - Disposition 5 (7 if hungry)
Venomous Fangs +1D Attack
Lithe Coils +1D Maneuver or Feint
Flee - Disposition 8
Cunning Motion +2D Maneuver
Camouflage +1D Feint
Capture - Disposition 10
Venomous Fangs +1D Attack
Camouflage Pattern +2D Defense
Kill - Disposition 6
Venomous Fangs +1D Attack
Lithe Coils +1D Maneuver, +1D Feint
Hmmmm…this sounds familiar…Lithe Coils, you say…Venomous Fangs, you say…
Also, Unprepared and Careless seems a little harsh…
Haha I mean in terms of deadly danger. Anything can hurt adventurers 
Keep in mind that the descriptors should be active words (usually -ing words). How does one ‘vicious’? How does one ‘swift’? A descriptor like ‘Striking’ tells you that snakes love to bite things, any biting action is in their nature. ‘Ambushing’ could also be good. Escaping, Pursuing, Slithering, Waiting… more ideas.
House cats should get a bonus to killing wizards.
Nature Descriptors should be: Moving swiftly, biting, slipping bonds…or something. They’re not traits.
The only descriptors that snake has now are Twitching Lifelessly, Spurting Black Blood, and Rotting.
Am I right?! Ay-O!
Gotcha, thanks for the feedback on the Nature descriptors. Natures are one area that is still a steep portion of the learning curve for me.