Caddisfly (Insecta: Trichoptera) fauna of altered and man-made habitats in the Drava River, NW Croatia

Adult caddisflies were collected in altered and man-made habitats of the hydro-electric power plant system in the Drava River in spring and autumn 2006. All sampled habitats (reservoir, drainage ditches, tailrace canals and old river channel) are greatly influenced by hydro-technical management. Altogether 24 species were recorded. Five species, Hydroptila sparsa, Hydroptila vectis, Tinodes pallidulus, Mystacides longicornis and Oecetis ochracea are new to the caddisfly fauna of Croatia. For five species, Hydropsyche angustipennis, Hydropsyche contubernalis, Psychomyia pusilla, Ecnomus tenellus and Silo nigricornis adult specimens are recorded for the first time in Croatia. Thus, the current study represents an important contribution to the knowledge of caddisfly fauna of Croatia.