A score, (20 +), of Nankeen Night Herons, Nycticorax caledonicus, have appeared at Kotta, a nocturnal bird, they spend the day in dense trees, close to water. The group includes mature birds in full breeding plumage, immature birds, and juveniles.
Nankeen Night Herons feed at night in shallow water on a wide variety of insects, crustaceans, fish and amphibians. They breed throughout the year, depending on food availability. Breeding takes place in colonies, often together with egrets and cormorants. The nest is a loose stick platform over water. Both sexes incubate the eggs.
Because it spends much of the day roosting hidden among dense foliage, only emerging in the twilight, the Nankeen Night-Heron is generally under-reported. Nevertheless, they occur throughout eastern and northern Australia, as well as in the western half of Western Australia. The species breeds in colonies which often comprise hundreds of pairs, with the largest colonies supporting thousands. Most of these large colonies are in the Murray–Darling Basin, and their numbers may build up quickly during wet years, and disperse when conditions deteriorate.
Conservation status in Victoria: Vulnerable
Source: Birdlife Australia