The Rumblehorn's nose plays a significant role in the 'How to Train Your Dragon' series. It is a Tracker Class dragon, known for its exceptional sense of smell. The Rumblehorn can find anything for miles away, even with just a weak scent from a helmet. This makes it an excellent tracking dragon, capable of locating objects or individuals over vast distances. Its nose is also designed to resemble an eagle's beak, symbolizing its predatory nature.