Errol, full name of Goodboy Bindle Featherstone of Quirm, was a swamp dragon in the Lady Ramkin's Dragon Sanctuary. He was thought to be a 'whittle' due to being constantly ill and having short, stubby wings. He was given to Vimes as a present by Lady Sybil Vimes, then Lady Ramkin. He ate absolutely everything, including a kettle, Carrot's armour polish and several toys given by various people.
- He was nicknamed 'Errol' by Nobby Nobbs because he reminded Nobby of his brother, Errol.