Fort Rock (Birding Oregon p. 27) is a wonderful open ring of rock rising out of the flat sage steppe of Lake County. The remnant of a lava eruption, worn down by the waves of an immense lake, the high rock walls are home to White-throated Swifts, Rock and Canyon Wrens, and various raptors. The sage flats inside and surrounding the structure attract Sage Sparrows and Green-tailed Towhees.
The rock is filled with bubbles, the result of lava erupting into a lake.
The moon over the western wall. There is a pair of Prairie Falcons in this photo, the male is on top of the ridge and the female is down and to the left near the whitewash.
Here’s a closer look at the Prairie Falcons.
A view of the west wall from inside the crater.
Rock Wren, blending in well with his surroundings
This Mountain Cottontail was soaking up a little sun on this cold windy morning.
The outside of the eastern wall near the parking area. This area seems to be best for White-throated Swifts and Canyon Wrens.
The vegetation near the parking lot attracts both migrant and resident birds. Brewer’s Blackbirds are common here.
Green-tailed Towhee being buffeted by the wind
Western Tanager
Cold temperature and high winds forced this Western Wood-Pewee to hunt from the ground.
Ethical Birder 
Your pewee photos are great and the tanager sure glows in the sagebrush. I remember mostly seeing lots of lizards there- and the swifts were cool to see. Looks like you saw way more birds than I did, but I was there in mid-summer.
That towhee shot is priceless! I am really enjoying your recent travel posts, thanks for sharing ’em!