Interesting combo. Vulture's plenty big enough to hurt/kill the owl, but the owl is far more agile and since their preferences in exhibit area don't overlap I guess it would work ok.
If my memory serves me right a long while back, maybe even a decade the zoo used to have king vulture free ranging in the walk through aviary. Anyone else remember this?
@nczoofan I think they had turkey vultures in the aviary. This was before they started displaying macaws and parrots. I also seem to recall them having a magpie in there too, but that was back around 2000.