5 min read

Here They Come!

On interpreting a "charge"
bighorn sheep
A male bighorn sheep in his element. Photo by David Lukas

You read about this all the time: visitors to a national park get too close to animals in search of photos, and then get hurt. However, in a situation last week where it seemed like angry bighorn sheep were confronting visitors in Jasper National Park, I had a different theory about what was happening.

Bighorn sheep are one of North America's most distinctive hoofed animals. Favoring dry mountains and open areas, millions of bighorns once roamed vast stretches of the American West, with early explorers describing thousands being found in some areas.

bighorn sheep
A band of bighorn sheep in the Canadian Rockies. Photo by David Lukas

Today's bighorn sheep numbers have plummeted, and while they're still relatively common, they're now almost entirely restricted to isolated bands or "population units" scattered throughout some of our more remote mountain landscapes and national parks.

range of bighorn sheep
Once found across a vast landscape, bighorn sheep are now restricted to hundreds of smaller, isolated pockets. Image from Wild Migrations by Kauffman et al.

For an animal that can navigate the most rugged mountains and handle temperatures down to -30°F, bighorn sheep are surprisingly fragile. Not only are they more vulnerable to certain respiratory diseases than human infants, but they are still hunted in many areas and readily disturbed by people.

bighorn sheep
Easily spooked where they are hunted, bighorn sheep readily adjust to humans in national parks. Photo by David Lukas

People love to see these unique and majestic creatures, and Jasper National Park in the Canadian Rockies is one spot where bighorns are fairly common and found in predictable locations.

bighorn sheep
Male bighorn sheep spend their summers in alpine meadows. Photo by David Lukas

During the summer and early fall, bighorn sheep typically separate into two bands. Older rams head for high alpine meadows where they feed on high quality grasses and forbs to build up their strength for the exhaustive mating season in November and December.

bighorn sheep eating grass
While bighorn sheep favor grasses, they will also nibble on forbs and shrubs. Photo by David Lukas

And, at the same time, females and youngsters seek out safer grazing areas in low-lying valleys.

Although bighorn sheep spend most of their day grazing, or resting and chewing their cud, males also spend a lot of time during the summer establishing and maintaining their dominance hierarchies. Males are famous for ramming their horns together but this is rare because they do most of their jockeying in far more complex and subtle ways.

The interactions between three males is what led to the situation I mentioned at the start of the newsletter. In this case, I was with a well-known herd of males who are watched all day long by a steady stream of hikers. In general, people watch from a respectful distance, but this time it didn't matter because these three rams looked over and started quickly and repeatedly closing the gap, closely following people as they backed up step by step.

bighorn sheep
Rapidly approaching rams. Photo by David Lukas

At first glance it seemed like these rams were aggressively approaching and I could hear people around me yelling things like "watch out they're angry" or "they're charging us!" I'm no expert, and I could be wrong, but I saw something else going on.

bighorn sheep
In this interaction, notice that there are two aggressors and one submissive ram with his head down. Photo by David Lukas

What was happening was that one of these males was being relentlessly and mercilessly picked on by the other two males. No matter where he went, or how he tried to ignore them, they wouldn't stop bullying him. At some point, he finally turned and started trotting towards the handful of people who had gathered at a distant viewpoint. Rather than charging aggressively or angrily, it felt to me like he was desperately trying to use the presence of people to shake his pursuers.

three male bighorn sheep
Look at how this submissive male is trying to get away from two bullies by approaching a group of people. (Compare this to the photo above, where he's much closer and has his head up while his pursuers have backed off.) Photo by David Lukas

Ultimately I can't be sure what was happening, but what I learned from this experience was the value of taking time to put myself in the animal's frame of mind. There was clearly a story going on here, but rather than reacting impulsively, I wanted to see what I could learn by paying close attention and treating these beautiful animals with the empathy they deserved.

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