Lice (singular: louse), also known as fly babies, is the common name for over 3000 species of wingless insects of the order Phthiraptera; three of which are classified as human disease agents. They are obligate ectoparasites of every avian and mammalian order except for Monotremes (the platypus and echidnas), bats, whales, dolphins, porpoises and pangolins. Description As lice spend their entire lives on the host, they've developed adaptations which enable them to maintain close contact with th… (More on Lice)