I would be a bit concerned with masked lapwings in a walk-through aviaries, simply because they can swoop faster and more accurate than magpies! Of course, this is not always the case but I have had experiences with them
interesting that (given that its an Australian aviary) they give Nettapus coromandelianus the common name of Indian Pygmy Goose rather than, say, Cotton Pygmy Goose or White Pygmy Goose.
They had a nest on island in the middle of the pond where the ibis are nesting. They had couple of chicks there and there is no complain from guests of aggressive lapwings. Although we had more aggressive canada geese on the zoo ground.
