Here is a list of things you can kill in Bree-land
On the Bree-Land page there are maps so that you can see where I'm talking about.
Dusk Wolves are like normal wolves but tougher.
Bears are commonly seen and are often Yearlings. But even so I have been killed by one.
There are also birds called crebain which are quite hard to kill, because they hang around in a flock which means that if you attack one there is a quite large chance that another one will be close enough to notice and fly over and retaliate. So then you will have two birds attacking at once which isn't a pleasant situation to be in, because, as I found out the hard way, even if you kill one, the other might still kill you.
You also get Boars which are like normal tuskers only tougher and blacker.
Around the Greenway there are lots of Field Bears and Boars with over 200 life.
At Dogwood's farm you get Southern Raiders, there is a quest that you can do where you have to kill some and find evidence of they're loyalty. I don't recommend fighting them until over level 14 as they would probably kill one of the more frail classes such as Hunter or Lore-master, they didn't pose a problem for my Guardian though.