The Deadly Nadder is a species of dragons found in the book series, and, despite its namesake's popularity in the How to Train Your Dragon Franchise, very little is said about it.
Traits and Abilities
Deadly Nadders are long and serpentine, and at least come in the colors of green or purple. Their bodies are so long and rope like, that they can get tangled when sleeping together for winter hibernation. In "How to Train Your Dragon" (Book 1), they have yellow cat-like eyes and ears (presumably this is referring to ear pinna (flaps)).
In A Hero's Guide to Deadly Dragons, Hiccup reveals that Deadly Nadders can be subdued by rubbing their bellies with the end of a twig of nettle.
In the Books
During his initiation test in Fishlegs tries to capture a Deadly Nadder, but wakes up the entire cave of dragons, forcing the young Vikings to flee for their lives from the Dragon Nursery.
A small, juvenile Deadly Nadder is wandering in the Caliban Caves crying for its mother. However, this dragon is eaten shortly after by the Monstrous Strangulator.
- In The Complete Book of Dragons: Guide To The Dragon Species, another Dragon called the Eight-Legged Nadder appears. Because the Eight-Legged Nadder looks exactly like a Deadly Nadder, has the same stats and has the name 'Nadder', it is possible that they are the same species and that 'Eight-Legged Nadder' is just another name for 'Deadly Nadder'.
- How to Train Your Dragon (Book) (Book 1), Cressida Cowell. 2003.
- How to Be a Pirate (Book 2), Cressida Cowell. 2004
- A Hero's Guide to Deadly Dragons (Book 6), Cressida Cowell, 2007