A Bowtruckle serves as a tree guardian for its home tree, preferably a Wiggentree, whose wood is of a recommended wand quality. The twig-like fingers are well adapted for digging out wood lice in trees, and can also be used as a weapon against a foe when aimed at the eyes. It is generally a peaceful creature, but will become violent if anything threatens its tree, or even to itself.
To take leaves or wood from a Bowtruckle's tree, one would have to offer it wood lice or fairy eggs as a distraction. Alternative foods for them are worms and maggots if the latter is not available.