There has always been something so sobering about roadkill to me.
Raccoon, Mouse, Pigeons (how does a pigeon get by a car; I wish there was some Planet Earth footage), Cats, Dogs, Horses (a least in Argentina) and other anonymous animals.
A corpse of an ex-living thing laying on the road as you drive you ten-speed bike or jog recreantly.
I used to stop to pay my respect to these lifeless carcasses and curiously observe insects (mainly large black ants) dissect their bodies for food.
Roadkill and dead animals in general.
Its a reminder of the fragility and frailty of life. Which stinks.