Ischnocera

The Ischnocera is a large suborder of lice mostly parasitic on birds but including a large family (the Trichodectidae) parasitic on mammals. The genus Trichophilopterus is also found on mammals (lemurs) but probably belongs to the "avian Ischnocera" and represents a host switch from birds to mammals. It is a chewing louse (Mallophaga), which feeds on the feathers and skin debris of birds. Many of the avian Ischnocera have evolved an elongated body shape. This allows them to conceal themselves between the feather shafts and avoid being dislodged during preening or flight.