Here you will see that the WOODPECKER makes a TOOL - KITCHEN BENCH - to prepare its food a good way. http://www.youtube.com/watch?v=M-7E9MG0uxc You can also observe that the Woodpecker is pecking on Pine Cones to get the seed.Then it can use both Pine trees and ROWAN TREES. However, it seem to use the ROWAN TREES as "SPICE". May be it is the Vit C it is taking from the BARK.