The Hyliidae family, composed of the green hylia and the tit hylia, is a duo of small, insect-eating songbirds native to the tropical African forest understory. Originally introduced by British ornithologist David Bannerman in 1923, the family's two species are each placed in their own genus—Hylia for the green hylia and Pholidornis for the tit hylia. These birds, once tentatively classified in other bird families such as Remizidae and Cettiidae, have been confirmed through physiological and molecular studies to belong to their own distinct family, though some taxonomic authorities consider them part of the Macrosphenidae. Hylias are particularly known for their presence in the humid forests where they contribute to the avian diversity with their melodious tunes and insectivorous habits.