It must have been a thrill to get this photo! Its a very nice composition, although I can't say I especially like the pastel green background. Very nice, indeed.
Sarah - I agree with David that your heart must have skipped a beat when you walked up on this critter. Such a big face with close-set eyes. Good work taking advantage of a great wildlife in habitat setting. Your composition is very nice as well. It will be fun to see more shots from Idaho, such a beautiful place.