Slate-colored Solitaire

The brown-backed solitaire is 19 to 20.5 cm (7.5 to 8.1 in) long and weighs 30 to 44 g (1.1 to 1.6 oz). The sexes have the same plumage. Adults are mostly slaty gray that is slightly lighter on their underparts than above. They have a broken white eye-ring, blacker primary coverts, black flight feathers with buff edges, and whitish gray outer tail feathers. They have a dark bill and yellowish legs and feet. Juveniles have a buffish "moustache". Their upperparts have black-edged buff spots and their underparts have whitish buff centers on the feathers that give a scaly appearance. Voice: The slate-colored solitaire's "loud, distinctive voice" is a "ringing metallic phrase, repeated regularly with little variation". It is described in much more detail as ethereal and haunting that "often starts hesitantly with a few poor notes, then breaks into varied series of clear or quavering fluty whistles, carefully delivered but of great beauty, often including or ending with loose trill, e.