Depending on the breeder, they are an excellent dog for bird hunting. They will both find and point birds as well as retrieve game on land and in water.
In addition, they are used to track furred game and track wounded big game.
Here are a couple of good resources for you to find out more information which should answer any specific questions you have about the breed:
www.navhda.org
http://www.nadkc.org/
http://www.gspca.org/
Good luck