Reference citation: Unander, S., A. Mortensen, and A. Elvebakk. 1985. Seasonal changes in crop content of the Svalbard Ptarmigan Lagopus mutus hyperboreus. Polar Research 3: 239-245.
Source citation: Allen Hurlbert. 2017. Avian Diet Database.
Reference citation: Unander, S., A. Mortensen, and A. Elvebakk. 1985. Seasonal changes in crop content of the Svalbard Ptarmigan Lagopus mutus hyperboreus. Polar Research 3: 239-245.
Source citation: Allen Hurlbert. 2017. Avian Diet Database.