"Polioptila melanura Lawrence 1857" . "Aves" . "Animalia" . . "Certhiidae" . . . . "Polioptila melanura" . . "Lawrence 1857" . . . . . . "Passeriformes" . "Black-tailed Gnatcatcher" . . . . "Polioptila" . . . "Chordata" . .