As JennieG says, avoid wombats at all cost. I've commented elsewhere on one that was hit by a Landrover and ended up under the back diff. The vehicle had to be jacked to lift it clear of the wombat, which promptly ran into the bush; the diff was cracked.

As it happens, I pick up my nice "new" Subaru from the panel beaters today. Two months after I got it I was going to SES training and going gently past the local TSR (Travelling Stock Reserve; a place where stock may be rested overnight in a piece of fenced bush) where, because I had seen the occasional kangaroo, I had kept to a moderate pace. This meant that. whe said macropod jumped into my path from behind some shrubs (kangaroos are notorious for changing direction randomly, often right into the path of danger) I slammed the brakes on (ABS is wonderful), which gave it enough time to aim itself right at my headlight. It scored, right at the junction of the maximum number of panels, roughly $5k worth.

I checked it (being a founder of the local WIRES group I always check marsupial "roadkill" that looks recent, as you can often recover young from a dead mother's pouch and hand raise it; it's also a good move to remove the animal from the road so that scavengers (eagles, crows and quadripeds) that arrive aren't also at risk of becoming roadkill.

Never a welcome moment, and the worst one I came across was a Big Red on the Stuart Highway, some hundreds of km from anywhere, let alone known WIRES volunteers. It had been killed during the night but had a joey young enough to be attached to the teat (meaning I'd have to have the special milk formula for that species at that stage of development) still trying to get whatever life was left from Mum. Putting it out of its misery with a tyre lever was the only way, but I had to wait until a passing coach full of tourists was out of sight.

Rowan