![North Dakota Game and Fish Department Logo](/gnf/base/gnf-logo.png)
Natural History Calendar
Birds
![Sharptail snow cave (example to illustrate what gray partridge also do)](/sites/default/files/styles/video_mobile_large_768w_x_432h_/public/2022-12/sharptail-snow-cave_0.jpg?itok=qFMYjSjT)
Gray Partridge
Gray partridge and sharp-tailed grouse often use snow for thermal cover, and may be found burrowing and roosting under snow.
(Early December through Late February)
![Northern hawk owl in tree](/sites/default/files/styles/video_mobile_large_768w_x_432h_/public/2022-11/northern-hawk-owl.jpg?itok=z8yLnN83)
Northern Hawk Owl
(Late November through Late March)
![Sage grouse female in grass](/sites/default/files/styles/video_mobile_large_768w_x_432h_/public/2022-12/sage-grouse-female.jpg?itok=zZ8Rwhno)
Sage Grouse
Sage grouse survival rates are relatively high in winter. Winter diet consists almost entirely of sagebrush buds and leaves.
(Early December through Late February)
![Sharptails in tree](/sites/default/files/styles/video_mobile_large_768w_x_432h_/public/2022-12/sharp-tailed-grouse-in-tree.jpg?itok=hhBib9Ru)
Sharp-Tailed Grouse
Sharp-tailed grouse diet consists primarily of berries (buffalo berry, rose hips, snow berrires, etc) and buds (green ash, alder, chokecherry, etc) during winter months.
(Early December through Late February)
![Sharptail snow cave](/sites/default/files/styles/video_mobile_large_768w_x_432h_/public/2022-12/sharptail-snow-cave.jpg?itok=i6e27ikM)
Sharp-Tailed Grouse
Sharp-tailed grouse and gray partridge often use snow for thermal cover, and may be found burrowing and roosting under snow.
(Early December through Late February)