Boat-billed Herons have been kept in large walk-through aviaries before just fine. Milwaukee keeps them with species as small as Taveta Weavers.Would boat-billed herons be okay to keep in a massive walkthrough aviary (like the one in beauval) in combination with small birds, like cotinga, and marmosets? Or would they prey on them?
I'd worried about the marmosets preying on bird eggs and chicks, though.