The Bucca, a rare Knucker subspecies, is the shyest kind of dragon. They hide in abandoned tin mines during daylight and make loud noises to scare off intruders. The colouration is black or brown.

They have very poor eyesight, but a strong sense of smell enables it to detect a rabbit at several hundred yards. However, due to its timid nature it is easily frightened by dogs, cats and even baby dragons.

Our eternally indefatigable guide to dragonology, Dr. Ernest Drake, once pretended to be eaten by a Bucca to escape Ignatius Crook.