<P> Tsetse can be distinguished from other large flies by two easily observed features . Tsetse fold their wings completely when they are resting so that one wing rests directly on top of the other over their abdomens . Tsetse also have a long proboscis , which extends directly forward and is attached by a distinct bulb to the bottom of their heads . </P>
how do tsetse flies ( glossina spp . ) differ from other dipteran flies
fold their wings completely when they are resting so that one wing rests directly on top of the other over their abdomens also have a long proboscis , which extends directly forward and is attached by a distinct bulb to the bottom of their heads