[Tweeters] Large hawk with white underside

[Thomas Einberger]

What large Seattle hawk could look snow-white below (even with the Sun
behind some clouds) from wing-to-wing except for a thick black line along
the back of the wings and around the tail making the small tail
white/black? Head and face looked white from below with maybe some small
dark splotches. Brief small looks at the top revealed medium-brown on the
wings in the area that I could see. All it did was soar low. No wingbeats
or calls to go by. Harlan's Red-Tailed Hawk and Rough-Legged Hawk have the
thick black outline, but they have other noteworthy black marks on the
bottom. Harlan's looks like it can lack other marks if the black line is
faint. Very rare Ferruginous Hawk has the snow-white but not the stand-out
black outline. No Gyrfalcon morph matches top and bottom coloration.
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