[Mystery bird] Blue (Dusky) Grouse, Dendragapus obscurus, photographed in the Bighorn Mountains of Wyoming. [I will identify this bird for you tomorrow]
Image: Terry Sohl, 18 August 2008 [larger view].
Photo taken with a Canon 50D, 400 5.6L.
Please name at least one field mark that supports your identification.
Review all mystery birds to date.