By Megan Sanders,
Animal Behavior Programs Manager
The weather is cooling off and CMZ’s resident Grizzly Bears are starting to show signs of the impending weather change. Over the past few months our keepers have been working very hard with “Emmett and Digger” teaching them to get on a scale so we can keep track of what their weight is doing. As growing bears it is important that they are gaining weight for the cold months ahead, and they are doing just that.
At “Digger’s” October weigh in he tipped the scales at a hefty 598 pounds (when arrived at CMZ he was just 429 pounds)! “Digger” is proving to be a fairly easy going bear getting on the scale without a second thought, as long as it is followed by a tasty snack.
“Emmett” on the other hand is a little more wary of the scale platform and on occasion decides he would rather just watch from afar. We never force him to do anything that he is uncomfortable with so on those “not so brave days” he just gets some treats for at least putting a foot on.
Many of our guests have asked us if our Grizzlies or other zoo animals will hibernate this winter. Hibernation is an instinct that many animals will continue to practice even in captivity if they live in cold enough climates.
Something that many people may not know about bears is that they are not a “true hibernator”. Instead they enter a state that is called Torpor, which basically means decreased physical and physiological activity. Unlike a “true hibernator”, during those winter months bears do still wake up to drink and forage. In captivity this just looks like a significant decrease in activity and food motivation. We have already started to notice our boys slowing down.
Over the summer, both bears were very food motivated and would train with the keepers as long as they would work with them. Over the past few weeks our once “snack happy” bears have even gone so far as to turn down food, and their tireless training sessions have been scaled back to accommodate their lower energy. So for now, some of their swimming sessions will most likely be replaced by a few extra naps. After all, they need to rest up so they can continue to delight us with their antics next spring!