Épinettes noires écorcées en anneaux, avec des lignes de fins trous pour récolter la sève. Comportement typique du Pic à dos rayé tel que décrit dans: Imbeau, L., Desrochers, A. (2002) Foraging ecology and use of drumming trees by three-toed woodpeckers. Journal of Wildlife Management, 66(1):222-231. / Black spruce, barked in rings, with lines of fine holes to collect sap. Typical behaviour of the American Three-toed Woodpecker as described in: Imbeau, L., Desrochers, A. (2002) Foraging ecology and use of drumming trees by three-toed woodpeckers. Journal of Wildlife Management, 66(1):222-231.