 The keel of the sternum was reduced and the owl may have been capable of short burst of flight.It is probable that, like a modern wild turkey, the owl only took flight when extremely pressed, more often choosing to run.The Cuban giant owl is believed to have preyed principally on large rodents including "Heteropsomys", "Capromys", "Geocapromys", and "Macrocapromys" (the size of modern nutria or capybara) and the ground sloths "Cubanocnus", "Miocnus", "Mesocnus", and "Megalocnus".