Pine cones are eaten by both red and grey squirrels. Pine cones are eaten by a variety of birds, including the woodpecker and crossbill. Squirrels leave the cores and peeled scales behind when they devour pine cones.
Birds, like squirrels, leave piles of stripped pine cone scales behind, however unlike the squirrels’ clean-edged scales, the pine cones left behind by birds are rough from being peeled from the cone. Woodpeckers will sometimes bury a pine cone in the bark of a tree to make it simpler to eat. The evidence can be found in the numerous piles of pine cone detritus found beneath trees.