You'll have to take that up with the Vermont Institute of Natural Science.
https://vinsweb.org/exhibits-activities/raptor-enclosures/
https://adopt.vinsweb.org/ambassadors/woodstock/
But you are correct about them eating road kill (their unbelievable stats in the last 1/3 of the season over the Steelers, Browns, Giants, etc.), and they will become road kill for themselves today. 🙂