Canary is the trusty familiar of the peasant and helps to collect gold. You have the Canary at the very beginning of the game, and will adventure accompanied by it until you rescue Griswold, the Collector, with whom you may switch the Canary to other familiars.
The Canary gains 1 XP per gold nugget, despite the size of the nugget. Gold picked up by both the player and the Canary grant experience towards the Canary's level.
The Canary starts at level 1, and is slow to pick up gold at first. On level 2, the gold income is increased by 20 %, which equals to 2 stacks of the Wealth Blessing. When the Canary reaches level 3, it speeds up considerably, picks up gold like a champion, and can also steal gold from the Pilfers, chirping victoriously whilst doing so.
In order to reach level 2, you need 200 XP, and to reach level 3, you need 800 XP. In other words, to level up the Canary to maximum level, you need to pick up a total of 1000 nuggets of gold.