The Boneknapper is a species of dragon thought to be almost mythical by Vikings due to its rare nature. As its name may suggest, the Boneknapper spends its time scouring the land for pieces of bones in order to create the perfect armor for its body. Sometimes, this bone armor can be essential for the dragon to perform basic actions, such as roaring. The Boneknapper will often go to extreme lengths to find the bones it seeks, hunting down the fragments for years. However, the dragon does have a docile side to its nature as well, as with most dragons around Berk.
It is 24 metres (79 feet) long.