| LINNAEUS | Creator of binomial system for animals (8) |
| CAROLUS | Latin name for the Swedish botanist who established a binomial system of biological nomenclature (7,8) |
| ASHTREES | Woody plants known by their binomial name Fraxinus excelsior, currently under threat of the Chalara fraxinea disease in the UK (3,5) |
| TAUTONYM | Binomial name, such as Martes martes, Puffinus puffinus, Rattus rattus or Vulpes vulpes, in which generic and specific epithets are the same (8) |
| LANDRAIL | Grassland bird with chestnut markings on its wings, with the binomial name Crex crex (8) |
| SWEETBAY | Evergreen tree, binomial name Laurus nobilis (5,3) |
| REDMAPLE | Deciduous tree from North America whose binomial name is Acer rubrum (3,5) |
| DOMAIN | The highest taxonomic rank in binomial nomenclature; a sphere of knowledge; or, in computing, a set of network addresses identified by a common name (6) |
| IMMOBILE | Not another binomial theorem? However, it's fixed (8) |
| ABIESALBA | Binomial name for the silver fir |
| PARUSATER | Binomial name for the coal tit |
| GENUS | An organism's binomial name consists of a ___ and a species. |
| VINCAMAJOR | Binomial name for the greater periwinkle (5,5) |
| LITTLEOWL | Often depicted with the goddess of wisdom Athena (hence its binomial nomenclature), the smallest bird in the Strigidae family found in Britain (6,3) |
| ANIMALS | Organisms for which Carl Linnaeus devised the first binomial nomenclature in Systema Naturae (7) |
| POLARBEAR | Animal whose binomial name is Ursus maritimus |
| WILDHORSE | Animal whose binomial name is Equus ferus |
| TRUMPETERSWAN | Animal whose binomial name is Cygnus buccinator |
| REDWOLF | Animal whose binomial name is Canis rufus |
| HOGDEER | Animal whose binomial name is Axis porcinus |
