Loose (plural: lice) is the common name for members o the order Phthiraptera, which conteens nearly 5,000 species o weengless insect. Lice are obligate parasites, livin freemitly on wairm-bluidit hosts which include every species o bird an mammal, except for monotremes, pangolins, baukies an cetaceans. Lice are vectors o diseases such as typhus.

Phthiraptera
Licht micrograph o Fahrenholzia pinnata
Scientific classification e
Kinrick: Animalia
Phylum: Arthropoda
Cless: Insecta
Superorder: Psocodea
Order: Phthiraptera
Haeckel, 1896
Suborders

Anoplura
Rhyncophthirina
Ischnocera
Amblycera