I'm reminded of this because I witnessed a spectacular collision with a deer this weekend (the best thing that can be said for the deer is that death was instantaneous). It was pretty clear that the SUV driver had no idea what they'd hit - they didn't even touch the brakes (I was driving behind them). The deer in this case had been running down the opposite side of the road before cutting across, so anybody who was paying the least bit of attention would have noticed. This deer was pretty small (especially in comparison to the SUV) so all it did was mangle the front grille. But I've come uncomfortably close to critters you really don't want to hit. Like moose.
If you're heading out into the wilderness (or driving through endless subdivisions) at dusk or in the evening, it's always best to keep an eye on the sides of the road and not just go on autopilot. It's especially tempting to blow through a more rural area, especially when you're heading back from the field and you're almost home, but that's when you're most likely to run into something. And you don't want to squash this guy, right?