I'm not sure I understand the reasoning behind your question. If the wildlife you are shooting are already moving, why are you concerned with the noise your camera makes?

If your objective is stealth, then as others have suggested, you should buy a quieter camera. Maybe a rangefinder?

The Hasselblad makes a unique sound that is part of the camera's charm. Wanting to shoot a Hasselblad without hearing its sound is, well, just wrong!