According to Baicich, P.J. and C.J.O. Harrison. 1997. Nests,
Eggs, and Nestlings of North American Birds. Academic Press,
San Diego.

"Breeds on mountains at high altitudes around glaciers and melting snow,
also on rocky islands in Alaska. Nest in a cavity or ledge of rocky
tundra outcropping. Sometimes in buildings on Alaskan islands, using
beams and cracks>
"Nest: Bulky; built of rootlets, mosses, lichen, grasses and pine
needles, when available; line thickly and firmly with fine grasses
and occasionally feathers (often from ptarmigan) and hair.
"Breeding season: mid-June to August. May be double brooded."

Kyle Hamish Elliott wrote:
>
> Hi,
>
> I am hiking up about 6000 ft near Pemberton, BC, this weekend and would
> like to find a Grey-crowned Rosy Finch nest. Does anyone have any
> suggestions on how to find Rosy Finch nests and what time of year they
> usually nest at this elevation in southern BC/northern Washington?
>
> Thanks,
> Kyle Elliott
> Delta BC

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Mike Patterson Alas, to wear the mantle of Galileo,
Astoria, OR it is not enough to be persecuted
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you must also be right.
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http://www.pacifier.com/~mpatters/bird/bird.html