15/09/2016
The bittern (Botaurus stellaris) is more likely to be heard than seen. The loud booming call, uttered by males during the breeding season, can be heard from up to two kilometres under suitable conditions. It is a secretive bird, its plumage subtly mottled in various shades of brown, which help it to blend with the reed stalks amongst which it lives. When startled it adopts a camouflage posture, bill pointing upwards and neck stretched vertically. In flight it resembles its close relative the heron but, in good visibility, is easily recognised by its colouration.
Australasian Bitterns specialise in living in dense beds of reeds and rushes, where they are surprisingly difficult to see, as they are particularly well camouflaged among reeds. Added to this, when alarmed, they stand still with neck stretched upwards and bill pointing skywards. Sometimes they even sway in the breeze, in time with the surrounding reeds. This makes them blend remarkably well into the surrounding vegetation. It is hardly surprising that the species is seldom recorded.
The Australasian Bittern is a heavy-set, partially nocturnal heron with upperparts that are patterned dark brown, buff and black, and underparts that are streaked brown and buff. The eyebrow and throat are pale, and the side of the neck is dark brown. The bill is brown and the legs are greenish. The Australasian Bittern is also called the Australian Bittern or the Brown Bittern.