The Amblycera are a large clade of chewing lice,
parasitic on both birds and mammals. The Amblycera are considered the most primitive clade of lice.
Amblycera
Louse is the common name for any member of the clade Phthiraptera, which contains nearly 5,000 species of wingless parasitic insects. Phthiraptera has variously been recognized as an order, infraorder, or a parvorder, as a result of developments in phylogenetic research.
Louse
Bovicola limbata, an ischnoceran louse from goats. The species is sexually dimorphic, with the male smaller than the female.
Drawing of a louse clinging to a human hair. Robert Hooke, Micrographia, 1667
Detail showing delousing from Jan Siberechts' painting Cour de ferme ("Farmyard"), 1662