Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/Dryu0003/dietdatabase/archive/bbd9be71f5db476449b66d948e4938dce5900300.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/Dryu0003/dietdatabase/archive/bbd9be71f5db476449b66d948e4938dce5900300.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/Dryu0003/dietdatabase/archive/bbd9be71f5db476449b66d948e4938dce5900300.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/Dryu0003/dietdatabase/archive/bbd9be71f5db476449b66d948e4938dce5900300.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/Dryu0003/dietdatabase/archive/bbd9be71f5db476449b66d948e4938dce5900300.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/HongyuLii/dietdatabase/archive/9b2c68014a3075f75a2e10755ea6cb483bc23a14.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/HongyuLii/dietdatabase/archive/9b2c68014a3075f75a2e10755ea6cb483bc23a14.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/HongyuLii/dietdatabase/archive/9b2c68014a3075f75a2e10755ea6cb483bc23a14.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/HongyuLii/dietdatabase/archive/9b2c68014a3075f75a2e10755ea6cb483bc23a14.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/HongyuLii/dietdatabase/archive/9b2c68014a3075f75a2e10755ea6cb483bc23a14.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/cooperrlynn/dietdatabase/archive/4f91e5649a21bc21bb6a74b43e8643a9b3f8788b.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/cooperrlynn/dietdatabase/archive/4f91e5649a21bc21bb6a74b43e8643a9b3f8788b.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/cooperrlynn/dietdatabase/archive/4f91e5649a21bc21bb6a74b43e8643a9b3f8788b.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/cooperrlynn/dietdatabase/archive/4f91e5649a21bc21bb6a74b43e8643a9b3f8788b.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/cooperrlynn/dietdatabase/archive/4f91e5649a21bc21bb6a74b43e8643a9b3f8788b.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/georgeni2442/dietdatabase/archive/204b664ea3314bf7dd1c27226767cd62fff4130f.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/georgeni2442/dietdatabase/archive/204b664ea3314bf7dd1c27226767cd62fff4130f.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/georgeni2442/dietdatabase/archive/204b664ea3314bf7dd1c27226767cd62fff4130f.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/georgeni2442/dietdatabase/archive/204b664ea3314bf7dd1c27226767cd62fff4130f.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/georgeni2442/dietdatabase/archive/204b664ea3314bf7dd1c27226767cd62fff4130f.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/jerichocook/BIOL395Project/archive/4942586a8792eef6b836a453820dfa8c361c76fb.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/jerichocook/BIOL395Project/archive/4942586a8792eef6b836a453820dfa8c361c76fb.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/jerichocook/BIOL395Project/archive/4942586a8792eef6b836a453820dfa8c361c76fb.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/jerichocook/BIOL395Project/archive/4942586a8792eef6b836a453820dfa8c361c76fb.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/jerichocook/BIOL395Project/archive/4942586a8792eef6b836a453820dfa8c361c76fb.zip

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.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

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.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

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.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

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.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

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.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

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.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

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.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

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.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

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.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

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.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Gasaway, W. C. 1976. Seasonal variation in diet, volatile fatty acid production and size of the cecum of Rock Ptarmigan. Comp. Biochem. Physiol. 53A:109-114.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Gasaway, W. C. 1976. Seasonal variation in diet, volatile fatty acid production and size of the cecum of Rock Ptarmigan. Comp. Biochem. Physiol. 53A:109-114.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Gasaway, W. C. 1976. Seasonal variation in diet, volatile fatty acid production and size of the cecum of Rock Ptarmigan. Comp. Biochem. Physiol. 53A:109-114.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Moss, R. 1974. Winter Diets, Gut Lengths, and Interspecific Competition in Alaskan Ptarmigan. Auk 91:737-746.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/hurlbertlab/dietdatabase/archive/de2b062bf553c6810839ced1baa3a0baf4d941d3.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/kinseyfish/dietdatabase/archive/7508fd9e83403d39ac8b8ceee6f92b3d537d4f9d.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/kinseyfish/dietdatabase/archive/7508fd9e83403d39ac8b8ceee6f92b3d537d4f9d.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/kinseyfish/dietdatabase/archive/7508fd9e83403d39ac8b8ceee6f92b3d537d4f9d.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/kinseyfish/dietdatabase/archive/7508fd9e83403d39ac8b8ceee6f92b3d537d4f9d.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/kinseyfish/dietdatabase/archive/7508fd9e83403d39ac8b8ceee6f92b3d537d4f9d.zip

Reference citation:
Gasaway, W. C. 1976. Seasonal variation in diet, volatile fatty acid production and size of the cecum of Rock Ptarmigan. Comp. Biochem. Physiol. 53A:109-114.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Gasaway, W. C. 1976. Seasonal variation in diet, volatile fatty acid production and size of the cecum of Rock Ptarmigan. Comp. Biochem. Physiol. 53A:109-114.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Gasaway, W. C. 1976. Seasonal variation in diet, volatile fatty acid production and size of the cecum of Rock Ptarmigan. Comp. Biochem. Physiol. 53A:109-114.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Moss, R. 1974. Winter Diets, Gut Lengths, and Interspecific Competition in Alaskan Ptarmigan. Auk 91:737-746.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

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.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

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.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

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.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

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.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

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.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

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.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

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.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

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.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

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.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

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.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R. B. 1969. Foods of Rock and Willow Ptarmigan in Central Alaska with Comments on Interspecific Competition. Auk 86: 271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip

Reference citation:
Weeden, R.B. 1969. Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk 86:271-281.

Source citation:
Allen Hurlbert. 2017. Avian Diet Database.

Source archive URL:
https://github.com/lanescher/dietdatabase/archive/1c739f6fab3ef7b74b491995f1349b51339df89f.zip