This is a very visible bird around Port Moresby. It is understandable that the immigrants from Europe wanted to call this bird a 'wagtail'. They even personalized it, calling it "Willie wagtail"... It has certain similarities with a White wagtail and its behavior, for example it wags its tail, like a wagtaill, when foraging on the ground. But this bird is larger and has a long tail that it can fan out. The subspecies here in Papua New Guinea, melaleuca, is also the largest of the three, over 21 cm long. This bird is insectivorous, aggressive and territorial even against much larger birds. Here it is caught on water lily leaves that bring to mind crocodiles in the water...