What is "nankeen night heron"

The nankeen night heron (Nycticorax caledonicus) also commonly referred to as the rufous night heron, and in Melanesia as Melabaob, is a medium-sized heron. It is found in Indonesia, the Philippines, Papua New Guinea, Melanesia, and throughout much of Australia except the arid inland. A small colony has also established near Wanganui, New Zealand