| English | Dutch |
| hook-billed kingfisher | haaksnavelijsvogel (Melidora macrorrhina) |
| hook-billed kite | langsnavelwouw (Chondrohierax uncinatus, Chondrohierax uncinatus uncinatus) |
| hook-lipped rhinoceros | zwarte neushoorn (Diceros bicornis) |
| hook-lipped rhinoceros | puntlipneushoorn (Diceros bicornis) |