This stalk-eyed fly (Achias rothschildi) belongs to the family Platystomatidae and is a highly localised species endemic to Papua New Guinea.
The eye-stalks are mainly used for display in confrontations with other males as they try to establish territory in order to attract a mate.
During conflict between males
The males have long eye-stalks, which vary in size so that the distance between the eyes ranges from about 20 to 55mm. The holotype of this species has the widest head of any known fly.
Achias rothchildi is one of a genus containing nearly 100 described species, most of them endemic to New Guinea. Get a further taxxonomic description ofthis species.
Achias rothchildi is endemic to Papua New Guinea. Find out about the types of habitat this species is known from.
The largest males have the widest head of any known fly. Learn about the size and growth patterns of Achias rothchildi.
Studies of stalk-eyed flies suggest that individuals with longer eye-stalks are more successful in conflicts between males, and therefore have an advantage when establishing territory. Discover more about the behaviour of this species.
Get reference material for Achias rothchildi.
A mounted specimen of the Achias rothchildi stalk-eyed fly held at the Museum.
A close up of the wing of Achias rothchildi,a stalk-eyed fly from Papua New Guinea.
A tropical rainforest in Papua New Guinea.
Achias rothchildi with a body length of 13.5 -16 mm and a wing length of 14 -16.5 mm.
A long eye-stalk of the male Achias rothschildi . The eye-stalks are mainly used for display in confrontations with other males as they try to establish territory in order to attract a mate. The eye stalks vary in length between individuals - those with longer stalks tend to be more dominant.