"Polioptila" . "Passeriformes" . "Chordata" . "Polioptila plumbea" . "Polioptila plumbea (J. F. Gmelin 1788)" . "Aves" . . . "Animalia" . . "Certhiidae" . "(J. F. Gmelin 1788)" . . . . "Tropical Gnatcatcher" . . . . . . . . . .