Common Miner

Identificazione

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.<p>The other subspecies of the common miner differ from the nominate and each other thus:

Tassonomia

Taxonomists assign these nine subspecies to the common miner:<p>Subspecies G. c. juninensis, G. c. titicacae, and G. c. frobeni might instead be members of a separate species. Subspecies G. c. georgei and G. c. deserticolor might also be members of another separate species.<p>Among members of genus Geositta, the common miner is most closely related to the slender-billed miner (G. tenuirostris).

Nome scientifico

Geositta cunicularia

Autorità

(Vieillot, 1816)

Ordine

Passeriformi

Famiglia

Furnariidae

Genere

Geositta

Areale e habitat

The subspecies of the common miner are found thus:<p>Though the International Ornithological Committee includes Paraguay in the range of cunicularia, the South American Classification Committee of the American Ornithological Society has no records in that country.<p>The common miner inhabits open landscapes including puna and temperate grasslands, arid lowland scrublands, and moister restinga scrublands. Most are flat to gently sloping and have sandy soils, short grass, and scattered rocks and shrubs. The species' distribution tends to be patchy. In elevation it ranges from sea level to 5,000 m (16,000 ft).

Migrazione

Migratori completi

Comportamento

Comportamento migratorio: Migratori completi.

Conservazione

Tendenza della popolazione: in diminuzione.

Tendenza della popolazione

in diminuzione