Pump up the jam, pump it up While your feet are stomping And the jam is pumping… After a good meal, who wouldn’t want a good jam, stretch, and scratch? Bears and other mammals in Glacier Bay often use ‘rub trees’ to spread their scent and mark their territory, but it sure looks like a nice way to scratch that itch you juuust can’t reach. Scientists use trail cameras to non-invasively monitor animals in Glacier Bay, leaving the wildlife undisturbed and providing valuable info for biologists. 🎥NPS Video Description: A brown bear walks up to a medium size cottonwood tree and turns his back to it to scratch, occasionally reaching for a branch to hold before dropping down. #GlacierBay #ParkScience #dance #bear #nationalpark #danceparty