JACKSON, Wyo. — When the moose are too tired to even spar with some zip in their step, it’s a sure sign that things in nature are slowing down as the end of the year draws near.

Video: Nick Sulzer // Buckrail

Buckrail photographer Nick Sulzer pointed his camera toward a pair of bull moose earlier this week and captured them in the midst of a half-hearted tussle.

Three bull moose lounge below the Tetons. Photo: Nick Sulzer // Buckrail

According to a recent social media post by Grand Teton National Park (GTNP), moose shift into energy-saving mode in the winter months. By shedding their antlers and moving less, moose are able to save hard-earned calories.

Video: Nick Sulzer // Buckrail

Willow leaves and branches make up 90% of a moose’s diet in the summer, and approximately 60% of its winter diet. Long legs help moose move through deep snow to find shrubs and subalpine fir.

A bull moose stands in sagebrush as a magpie flies above. Photo: Nick Sulzer // Buckrail

GTNP urges wildlife watchers to give moose plenty of space in the winter and never force an animal to move, as it might be resting to avoid wasting energy.

Check out other photos and videos of moose on Buckrail here.

Monica is a Staff Reporter who studied journalism at Syracuse University and has been in the valley since 2015. She loves writing about the local food and bev scene, especially craft beer. When she’s not on the clock, you can find her paddle boarding, sewing, or whipping up a new recipe at home.