Nature Smart

Gray Wolf pack taken in yellowstone NP in winter

By Stan Tekiela

Just the day before, a pack of wolves known as the Wapiti, had found a large bull bison that was weak and injured. Based on its size, this big boy was near the end of its lifespan and the winter weather was taking its toll. For a full day the wolves tried to approach the bison but when the bison turned to defend itself, the wolves retreated for fear of being injured themselves. All of this took place along the Firehole River in Yellowstone this past week while I was leading a group of photographers on a photo adventure.

Large male bison often weigh over 2,000 pounds (one ton) and are extremely strong and powerful animals. The big males are the size and weight of a small automobile. Their hides are thick and covered with fur making it very difficult for a wolf to grab ahold or tear the flesh of a bison. On the other side, the average weight of a wolf is around 80 pounds and is considerably smaller than the bison.

The bison was along the banks of the river and often retreated into the water to escape the wolves. At some point the bison, too weak from the winter weather, simply put its head underwater and drowned. This was the break the wolves needed. The 10 or so wolves entered the river and started pulling on the bison. Eventually the current took the carcass downstream about a couple hundred yards and got caught up on a shallow spot in the river.

The day after the demise of the bison, I arrived with my group of photographers. We had heard all the details of the day before, so we were eager to get to the scene. Early morning in the dark, we piled into our snow coach, a massive vehicle with 48-inch all terrain tires and headed into the depths of the park. Arriving just after daybreak, we set up about 130 yards away from the half-eaten bison carcass in the river. A coyote was already there trying to strip off some meat from the water-soaked hide.

The weather was cooperating with us. The temperatures were right around freezing with no wind, so if you are dressed right, this makes for very comfortable conditions. While everyone was busy capturing images of the coyote, off to our left deep in the woods, the Wapiti pack was bedded down and resting out of sight.

A couple hours after we arrived, we spotted the first wolf making its way through the forest heading in our direction. The coyote, knowing better, vacated the carcass when it saw the approaching wolves. At first, we only saw one black wolf then a second. The two wolves who looked like siblings, stopped at the edge of the forest where a small stand of young fir trees where growing. They surveyed the area carefully before approaching the carcass.

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