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| English | German |
| flat-faced bottlenose | südlicher Entenwal (Hyperoodon planifrons) |
| flat-fronted bottlenose | südlicher Entenwal (Hyperoodon planifrons) |
| flat-headed bottle-nosed whale | südlicher Entenwal (Hyperoodon planifrons) |
| flat-headed cat | Flachkopfkatze (Felis planiceps) |
| flat-skulled marsupial mice | Flachkopfbeutelmäuse (Planigale) |
| flat-skulled marsupial mouse | Nord-Flachkopfbeutelmaus (Planigale ingrami) |
| flat-skulled marsupial mouse | nördliche Flachkopfbeutelmaus (Planigale ingrami) |
| flat-skulled marsupials | Flachkopfbeutelmäuse (Planigale) |
| flat-skulled shrew | flachköpfige Waldspitzmaus (Sorex vir) |
| flat-tailed otter | Riesenotter (Pteronura brasiliensis) |
| flat-tailed otters | Riesenottern (Pteronura) |