silhouette head human louse pediculus humanus

lice louse vector head humanus pediculus insect body capitis drawn graphic human bug cartoon animal sketch skin drawing blood disease avian parasite arthropoda outline insecta danger scalp agent handdrawn scavengers sebaceous mammalian host debris pterygota clip clipart ectoparasites exopterygota neoptera one parthenogenetic phthiraptera secretions wingless