The emperor is a medium-sized stocky goose with a white head and metallic blue-gray body reminiscent of a blue-morph snow goose. Dark throat and undertail coverts as well as yellow feet distinguish it from the latter. Juveniles are brown with a gray-black head and neck that becomes white with black flecking in late fall.

Vocalizations include in-flight kla-ha, kla-ha, kla-ha, and an alarm call a deep ringing u-lugh, u-lugh, u-lugh. The emperor is a rare but regular visitor in Oregon during migration and in winter, most commonly on the coast.

Hear the call of the emperor goose

Photo from USFWS