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Scientific Name: Ursus americanus


Hibernation: Prior to hibernation bears add four inches of fat, gaining two to three pounds a day. They also...

  • do not eat

  • do not urinate

  • do not defecate

  • curl up to conserve heat

  • change position in den

  • may be aroused and attack an intruder

  • slough paw pads

  • lose weight (15% to 30%)

  • metabolism slows

  • digestive organs and kidneys shut down almost completely

  • Uses 4000 calories/day from their fat reserve

  • Poisonous wastes, by-products broken down

  • Heart rate 20 to 30 beats per minute (normal 70/min) This is with Buffy.

  • Normal body temperature is over 100, in hibernation it drops only a few degrees.

  • Some southern populations do not hibernate during mild winters, bears of Louisiana, Florida, and Arizona sleep only a few days at a time in a den.

  • Breathing: 6-10 respirations per minute


Diet: Frogs, fish, ants, invertebrates, small vertebrates, crayfish, grubs, carcasses, bees, eggs, human garbage, berries, mushrooms, grasses, fruits, nuts, seeds, honey, herbs, cambium (underbark), acorns, melons, vegetables.


Range: 3.6 to 108 square miles


Speed: 25-30 mph

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