Do Dall sheep have specific feeding habits that change with the seasons?

Seasonal Forage Availability

In Alaska, Dall sheep typically migrate to higher elevations during the summer months (June to September) to take advantage of lush vegetation, including grasses, forbs, and shrubs. During this time, they can be found grazing on steep mountain slopes and ridges, where they require an average of 5-7 square feet of forage per day. This forage is crucial for the growth and maintenance of their thick coats and layers of fat.

Winter Forage Strategies

In contrast, during the winter months (October to May), Dall sheep must rely on lower-elevation habitats with more limited forage options. They may concentrate on areas with snow-free zones, such as north-facing slopes, and utilize techniques like “snow plowing” to access buried vegetation. This involves using their horns to push snow aside and reveal patches of forage, allowing them to access an estimated 1-3 square feet of forage per day.

Habitat and Elevation Preferences

Dall sheep are highly adaptable to their alpine environment and can be found in a variety of habitats, including meadows, ridges, and rocky outcrops. However, their feeding habits are closely tied to specific elevations, with the majority of their foraging occurring between 6,000 and 10,000 feet. This elevation range provides optimal access to forage, while also minimizing competition from other ungulates and predators.