Galligan, Toby H. Naris and beak malformation caused by the parasitic fly, Philornis downsi (Diptera: Muscidae), in Darwin's small ground finch, Geospiza fuliginosa (Passeriformes: Emberizidae). - 2009. English Subjects--Index Terms: Parasitic fly Mosca parasita Philornis downsi Small ground finch Pequeño pinzon terrestre Geospiza fuliginosa Dewey Class. No.: 598.883