Big Spotted Gormlesses, true to their name, are depicted as having large black spots on a green background. They can have more than one head, and can be larger than a small Viking village. However, Gormlesses are mentioned very briefly in How to Speak Dragonese. In the following excerpt they are clearly not depicted as being excessively large, as they are trapped with other dragons on a large Roman ship.
- "An enormous number and variety of dragon species were being held prisoner behind the bars of this cage. Deadly Nadders, Flying 'Gators, Big Spotted Gormlesses, Yellow Vampires, Common or Gardens - you name it, they were all there, trapped together in a furious tangle of talons and wings and fangs, ready to be sent back to the restaurants and shoemakers in Rome."
- ―How to Speak Dragonese
Despite their low intelligence, Big Spotted Gormlesses are able to speak Dragonese. Their large size is also an advantage, as they would have few predators. Gormlesses are one of the few vegetarian dragons, and feast on forests and other wooded areas.
Gormlesses have poor eyesight, and will on occasion sit on a village. However, it is not purposeful—they are rather docile and non-aggressive. They are not known to be very bright. This may have contribute to their poor mating drive. Because of this seldom reproduction, Big Spotted Gormlesses are rather rare.
Perhaps because of their low intelligence, Gormlesses are rated a "7" in Disobedience.
Big Spotted Gormlesses remained unaligned in the Dragon Rebellion.
Big Spotted Gormlesses are mentioned once in this book - these dragons, along with several other species, were being help captive by the Romans to be shipped off to Rome to be killed and eaten and used for clothing.
This reference manual contains most of the information and an image of these dragons.