- "Fishlegs: "What do you know about Brainpickers, Hiccup?"
Hiccup: "Well, I know they feed on people's brains by sucking them out through their ears."
- ―How to Steal a Dragon's Sword
Brainpickers are first discussed in How to Steal a Dragon's Sword, and then mentioned in a few other books.
It is a small Cave Dragon feared by all others, even the Seadragonus Giganticus Maximus. There is not much of a description, nor any picture of them. Brainpickers have some sort of proboscis, or "pick", through which it devours the brain of its victim.
The "pick" and its diet of brains is the Brainpicker's main asset. Even the largest dragon in the Books, the Seadragonus Giganticus Maximus fears them. They will eat human brains, dragon brains, or even badger brains, whatever is available.
In How to Fight a Dragon's Fury, Brainpickers are shown to be vulnerable to heavy artillery fire:
- "Even the mighty Rageblasts, or Savagers, or Brainpickers, when hit with those cannonballs, fell shrieking from the sky."
- ―How to Fight a Dragon's Fury
Brainpickers are mentioned again in Book 11, when Hiccup sees "a Brainpicker with its 'pick' fixed into the head of a poor dead badger", amongst the dragon followers of Furious.
Inthis final book of the Series, Brainpickers are seen fighting against the humans on the side of the Dragon Rebellion.
In this Reference book for the How to Train Your Dragon Book Series, Brainpickers are mentioned in the informational table in the back, but not featured elsewhere in the book.