| regnum = Animalia | phylum = Arthropoda | classis = Insecta | superordo = Amphiesmenoptera | ordo = Trichoptera | subdivision_ranks = Suborders | subdivision = Annulipalpia Spicipalpia Integripalpia }} Trichoptera (Greek: trich, "hair" + ptera, "wings") 's an order of insects. Member species, known as caddisflies, sedge-flies or rail flies, are small moth-like insects having two pairs of hairy membranous wings. They're closely related to Lepidoptera (moths and butterflies) which have scales o… (More on Trichoptera)