"Chordata" . . "Animalia" . "Cuculus crassirostris" . "Aves" . "Sulawesi Hawk-Cuckoo" . . . . . . "Cuculiformes" . . "Cuculidae" . "(Walden 1872)" . . . "Cuculus" . . . "Cuculus crassirostris (Walden 1872)" . . . .