I leaned closer, gagging a little, and yep, it looked like grass. I couldn't make heads or tails of it. But I knew I had to move the carcass off the road. And as I picked the owl up and slapped at the darn louseflies, a bolus fell out of what had been the stomach.
Being a Science Chimp, I had to know. So I picked at the stuff and what do you know? A praying mantis foreleg (far right) appeared in the mess.