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Archive for September 7, 2012

Black Bear Signs & Hyperphagia

Black bears are omnivores as well as opportunists.  They will eat almost anything that they can find, but the majority of their diet consists of  grasses, roots, berries, nuts and insects (particularly the larvae).  In the fall, prior to going into hibernation, black bears enter a stage called “hyperphagia,” which literally means “excessive eating.”  They forage practically non-stop — up to 20 hours a day, building up fat reserves for hibernation, increasing their body weight by 35% in some cases.  Their daily food intake goes from 8,000 to 15-20,000 calories (that’s roughly equivalent to 70 McDonald’s cheeseburgers).  Signs of their foraging for grubs and beetles, such as the excavated base of the snag in the photograph, can be found with relative ease at this time of year, if you live where there are black bears.  If you do share their territory with them, be forewarned that they have excellent memories, especially for food sources.  Be sure not to leave food scraps or pet food outside (my compost bin was destroyed last year but I have no solution for that particular problem), and if you really don’t want any ursine visitors, it’s best to not start feeding birds until most black bears have entered hibernation – late December would be safe most years.