I just returned from a family trip to Harney County with Chris Hinkle and our parents, Em and Steve.
Upon arriving to Fields on the evening of 31 May, we had two American Redstarts and one singing Gray Catbird. Clouds, rain, and wind persisted into the evening, but for the rest of the trip we had mostly sunny skies and little wind.
June 1st was an interesting day in Fields, and more surprising than the smattering of vagrants were Mountain Chickadee, Brown Creeper, and Hermit Thrush. Warblers were scarce, but we had a few (about five to ten each) pewees, Warbling Vireos, Black-chinned Hummingbirds, tanagers, and empids. Further, we had Gray Catbird, a singing Least Flycatcher, Northern Mockingbird, and a surprise flyover Purple Martin, which flew in from the east and continued westward. In Andrews we found an immature male American Redstart.
June 2nd in Fields was slower than the day before, but new migrants included Long-eared Owl, Eastern Kingbird, Swainson's Thrush, Great Egret, and Spotted Towhee.
June 3rd proved even slower in Fields, with few warblers and not even a pewee, but we did find two Gray Catbirds (we suspect new arrivals) and one Magnolia Warbler. Roaring Springs Ranch had two Great-tailed Grackles (viewed from the road), and in the afternoon we refound Magnolia Warbler, American Redstart, and Chestnut-sided Warbler at Malheur HQ (first reported by Dan and Anne Heyerly - thanks!), along with 2 Gray Catbirds, Ruby-crowned Kinglet, Red Crossbill, White-crowned Sparrow, and other migrants.
On June 4th, HQ had the continuing Chestnut-sided Warbler, Gray Catbird, and Ruby-crowned Kinglet, but no new migrants at all, aside from one Rufous Hummingbird and a Long-billed Dowitcher. June 5th had a small mix of new arrivals, though all lingering migrants from the day before had departed. One singing Townsend's Warbler was our first of the trip. The Gray Catbirds seemed gone, further suggesting that SE Oregon vagrant traps simply get a fair number of these migrants, as opposed to single long-staying individuals.
We did explore Pikes Creek, the Pueblo Mountains, and several parts of Malheur NWR refuge, finding a nice mix of expected species, but nothing of exceptional note.