Hormiguero Colirrufo

Identificación

The rufous-tailed stipplethroat is 10 to 12 cm (3.9 to 4.7 in) long and weighs 9.5 to 12.5 g (0.34 to 0.44 oz). Males are the only members of the genus lacking a contrasting throat. Adult males of the nominate subspecies have a mostly gray face and a whitish throat with some black streaks. Their crown, neck, and upper back are olive-brown; their lower back, rump, and tail are rufous-chestnut. Their wings are brown; their wing coverts are blackish brown with pale buff or white tips. Their breast is gray and their belly and undertail coverts light olive-brown to buff-brown. Adult females have a gray face with a buff tinge. Their throat and breast are ochre and the rest of their underparts brown with an ochre tinge. Both sexes have a red or orange iris and a dark bill. Males of subspecies E. e. septentrionalis look the same as nominate males; females are more ochraceous on their face and underparts.

Taxonomía

The rufous-tailed stipplethroat was described and illustrated by the English zoologist Philip Sclater in 1890 and given the binomial name Hypocnemis erythrura. It was subsequently placed in genus Myrmotherula. Based on genetic and vocal studies it and seven other members of that genus were moved to genus Epinecrophylla created in 2006. All were eventually named "stipplethroats" to highlight a common feature and to set them apart from Myrmotherula antwrens.<p>The rufous-tailed stipplethroat has two subspecies, the nominate E. e. erythrura (Sclater, PL, 1890) and E. e. septentrionalis (Zimmer, JT, 1932).

Nombre científico

Epinecrophylla erythrura

Autoridad

(Sclater, PL, 1890)

Orden

Passeriformes

Familia

Thamnophilidae

Género

Epinecrophylla

Distribución y hábitat

The rufous-tailed stipplethroat's nominate subspecies is found from southeastern Colombia south through eastern Ecuador into northeastern Peru to the Marañón and Amazon rivers and east into extreme northwestern Brazil. Subspecies E. e. septentrionalis is found in eastern Peru south of the Marañón and in west-central Brazil south of the Amazon. The species primarily inhabits terra firme evergreen forest in the lowlands and foothills, but also transitional forest and várzea. In elevation it occurs below 600 m (2,000 ft) in most of its range and locally up to 900 m (3,000 ft).

Migración

Resident species

Comportamiento

The rufous-tailed stipplethroat is believed to be a year-round resident throughout its range.<p>The rufous-tailed stipplethroat feeds on arthropods, especially insects and spiders. It typically forages singly, in pairs, or in small family groups, and usually as part of a mixed-species feeding flock. It mostly forages in the forest understory to mid-storey between about 5 and 15 m (15 and 50 ft). It takes its prey almost entirely by gleaning from dead leaves on trees but also from dead leaves caught in vine tangles.<p>Male rufous-tailed stipplethroats display to each other from perches less than 1 m (3 ft) apart; they puff up their back plumage, spread their wings and tail, sway back and forth, and continuously vocalize.<p>Almost nothing is known about the rufous-tailed stipplethroat's breeding biology. Nest building has been observed in February. A different nest was a dome-shaped ball with a side entrance, made of dead leaves and placed in a dense shrub.<p>The rufous-tailed stipplethroat's song has been described as an "unmusical, extr. high, slightly descending 'seep-seep-seep-' " and as "a high-pitched 'swee, swee-swi-swi-seeseeseesr' ". Its call is "a short, high pitched, upslurred note, also a rattle".

Conservación

Tendencia poblacional

stable