Nightshade

Nightshade was a buck who told Threarah that he was getting in on years after Hazel and the others left, and men came to examine the holes. Then Threarah scratched him saying that he was the boss. He was mentioned when Holly was telling his story.

Rabbits

Cross-media

Sandleford Warren
Bigwig • Blackberry • Bluebell • Captain Holly • Dandelion • Fiver • Hawkbit • Hazel • Hazel and Fiver's Mother • Pipkin • Pimpernel • Silver • Threarah • Toadflax

Nuthanger Farm
Boxwood • Clover • Haystack • Laurel
Cowslip's Warren
Cowslip • Kingcup • Laburnum • Silverweed • Strawberry
Efrafa
Avens • Blackavar • Captain Campion • Captain Chervil • Captain Orchis • Charlock • General Woundwort • Hyzenthlay • Ragwort • Sainfoin • Thethuthinnang • Thistle • Vervain • Vilthuril
Other/Folklore
Black Rabbit of Inlé • El-ahrairah • Hemlock • Hufsa • Laurel • Rabscuttle

Books/graphic novel only

Introduced in Watership Down
Acorn • Ash • Bartsia • Betony • Buckthorn • Butterbur • Captain Bugloss • Captain Mallow • Coltsfoot • Flesca • Groundsel • Marjoram • Moneywort • Nelthilta • Nightshade • Nildro-hain • Nose-in-the-Air • Pine Needles • Scabious • Snowdrop • Speedwell • Thrayonlosa • Threar • Thunder

Introduced in Tales from Watership Down
Burdock • Celandine • Crowfoot • Crowla • Fescue • Flyairth • Foxglove • Heartsease • King Fur-Rocious • Knapweed • Lemista • Loosestrife • Melsa • Mian • Milmown • Nyreem • Peerton • Prake • Quiens • Rithla • Sandwort • Stitchwort • Stonecrop • Thrennion • Tindra • Woodruff

TV series only

Aspen • Bluesky • Buttercup • Captain Broom • Felspar • Flax • Gentian • Gilia • Gorse • Granite • Heather • Hickory • Larch • Mallow • Marigold • Moss • Primrose • Raincloud • Red • Shale • Snowdrop • Spartina • Speaker of the Past

Film/Miniseries only

Dewdrop (Miniseries) • Nettle (Miniseries) • Violet (film)