Description wikipedia

The common miner (Geositta cunicularia) is a passerine bird in the subfamily Sclerurinae, the leaftossers and miners, of the ovenbird family Furnariidae. It is found in Argentina, Bolivia, Brazil, Chile, Peru, and Uruguay. The common miner is a medium-size member of its genus. It is 14 to 17 cm (5.5 to 6.7 in) long and weighs 20 to 34 g (0.71 to 1.2 oz). The sexes are alike. The nominate subspecies G. c. cunicularia has a pale brownish face with a wide whitish supercilium and a vague darker "moustache" and line behind the eye. It has a dull grayish brown crown and upperparts; the former has dark brown spots. Its uppertail coverts are dull grayish brown with pale brownish tips. Its tail feathers have buff-whitish bases and blackish ends with pale rufescent between them. The pale area is progressively larger from the innermost to the outer feathers and the outermost have almost entirely white outer webs. Dull brownish wing coverts with pale buff tips form distinct wing bars. Its flight feathers are dull brownish with a wide pale rufous band. Its throat is whitish, its breast buff-white with wavy brownish streaks, its belly pale buffy whitish with a pale cinnamon tinge on the flanks, and its undertail coverts whitish. Its iris is brown to yellowish brown, its medium-length bill is black to brown with sometimes a pale base to the mandible, and its legs and feet are dark gray to black.