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Genus Perisoreus
Grey Jay - Although the Gray Jay can fluff up its dense plumage and give the impression of large size, it is actually one of the smallest jays in the world, males weighing about 76 grams and females only about 68 grams . Both sexes typically have light gray underparts, medium-gray upperparts, and a partial black cap on the back of an otherwise white head. Birds on the Pacific coast of Washington and Oregon states have more extensive black on the head and noticeably darker backs with conspicuous white streaks. Individuals from the southern Rockies have black caps that fail to reach forward as far as the eye, giving that race a noticeably more white-headed appearance. Juvenile plumage is sooty gray all over, though slightly darker on the head.
Siberian Jay - The Siberian Jay Perisoreus infaustus, is a jay who is found in north Eurasia. The species has a wide range and a large global population .
Sichuan Jay - Its natural habitat is subtropical or tropical moist montanes. It is threatened by habitat loss.