Those white feathers are standard issue for the under tail. They can be fluffed downward to keep feet and legs warm in winter. And they often puff out at the base of the tail in flight. If you ever get to look down on a goshawk in flight, the accipiter’s white puffs will look even more pronounced. In this bird the feathers have gotten ruffled. Thus bird, likely a female adult, was not in our garden too long, but posed nicely though all images taken through a window. It’s the second straight day we’ve seen a Cooper’s Hawk in our garden.
I did finally see two collared-doves in the afternoon…on the other side of the house, out of view of the feeders.
FOY–Anna’s Hummingbird, feeding at the mahonia in bloom. We bought that bush specifically to feed our winter hummers.
Audubon’s Warbler logs on:
Other garden birds:

OUT BAKER CREEK ROAD
There were 300 Ring-necked Ducks in the large pond on Pheasant Hill Road. And I spent some time trying to lure a Varied Thrush into view…through the thickets of the abandoned apple orchard at Grenfell Park.
820 NW 19th Street, McMinnville, Yamhill, Oregon, US
Jan 5, 2020
16 species
Canada Goose X
Eurasian Collared-Dove 2
Anna’s Hummingbird 1–FOY
Cooper’s Hawk 1
Chestnut-backed Chickadee 3
Bushtit 25
Red-breasted Nuthatch 1
Bewick’s Wren 1
European Starling 10
House Sparrow X
House Finch 3
Dark-eyed Junco 30
Golden-crowned Sparrow 2
Song Sparrow 1
Spotted Towhee 2
Yellow-rumped Warbler 1
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