Realistic Wildlife Behaviors
When you come across a bear or a wolf in Skyrim they typically attack your character on sight. In real life, they'd probably run away and only attack if they were extremely hungry or threatened.
With Realistic Wildlife Behaviors installed you'll notice a change in the behavior of bears, wolves, and many of the other creatures that populate Skyrim's world.
Bears will still attack you but they will warn you a few times before they resort to violence. Wolves will give you some additional time to retreat before they attack. Sabrecats will do the same.
There are also a few other notable changes in this mod. Mudcrabs, those relatively harmless creatures you see along the shores of Skyrim, are no longer hostile.
The elk and deer that dot the game's forests aren't as skittish as their vanilla counterparts and Horkers are no longer hostile.