yes, deer is most dangerous... i hit a rabbit few times, also hit owl with windshield, pheasants, saw a fox few times... but most common are stray dogs. they allays have something against spinning tires...
I hit a pheasant in the Cinquecento. It honestly looked like some kind of Tom & Jerry pillow fight, seriously I couldn't see for feathers. I was picking them out of the engine bay for weeks.
Little bugger managed to get the front numberplate in his final moments on earth though...