The enclosure was the same size as those for the other smaller hornbills. Attached is a photo of this aviary with the pied hornbills' aviary next to it.
I agree that they're very poor. I don't think the brown hornbills even had a nestbox. Food trays and water are on the ground.
Pata zoo is on the top two floors of a department store/mall. The upper floor is mostly outdoors, and the lower floor is indoors. The enclosures of the lower floor, with exceptions (large monitors, some turtles, amphibians & snakes in small vivs, hedgehog & owl enclosures, small indoor aviary...) would be deemed acceptable in most zoos, and would hardly receive a second glance were they in reasonable zoos in the west.
The upper floor, however (which includes the hornbills, primates, cats, small rare birds, parrots, jackals...) does not have a single decent enclosure in the entire space, and many of them are very saddening. The walkthrough aviary on that floor looks reasonable but was closed.
