I had a rabbit dart between my wheels on a climb. He got whacked with one pedal but scampered off and seemed no worse for the wear. I hit a bird once in a motorcycle race while going over 100mph. It hit my knee. Despite the knee protection in the leathers and the knee puck, it hurt like hell. It did leave a bruise, but the bird fared much worse judging by the explosion of feathers and the juice left on my leathers (extra points awarded for the incidental rhyme). I also ran over a tarantula on a commute home. He went squish.