Rufous-backed Stipplethroat

Identificazione

The rufous-backed stipplethroat is 10 to 11 cm (3.9 to 4.3 in) long and weighs 8 to 10.5 g (0.28 to 0.37 oz). Adult males of the nominate subspecies E. h. haematonota have a mostly light gray face and a black throat with white spots. They have a grayish olive-brown crown and mantle, and deep rufous back, tail, and flight feathers. Their wing coverts are blackish brown with pale buff or white tips. Their breast and upper belly are light gray and their lower belly, flanks, and undertail coverts yellow-brown. Adult females have a mostly light yellowish olive-brown face and underparts. The tips of their wing coverts are pinkish buff. Their throat is white to pale buff, usually with dark feather bases visible, and sometimes with black streaks. Males of subspecies E. h. pyrrhonota have brighter rufous uppersides than the nominate. Females have a yellow-ochre face and throat; the latter is unmarked. Their breast and belly are reddish yellow-brown to reddish-tinged buff, and their flanks and undertail coverts are olive-brown. Males of subspecies E. h. fjeldsaai have an olive-brown crown, dark yellowish brown upperparts, and rufous-tinged flight feathers and tail that are darker than the nominate's. Females have an ochraceous face, a dark-streaked mostly white chin and throat, and buffy brown underparts.

Tassonomia

The rufous-backed stipplethroat was described by the English zoologist Philip Sclater in 1857 and given the binomial name Formicivora haematonota. It was later placed in genus Myrmotherula . Based on genetic and vocal studies it and seven other members of that genus were moved to the newly created genus Epinecrophylla. All were eventually named "stipplethroats" to highlight a common feature and to set them apart from Myrmotherula antwrens.<p>Since 2019 taxonomists have recognized these three subspecies within Epinecrophylla haematonota:<p>For a time previously each of these had been treated as separate species, the rufous-backed (or Napo stipple-throated) antwren (E. haematonota), Negro stipple-throated antwren (E. pyrrhonota), and Yasuni antwren (E. fjeldsaai). The three were returned ("lumped") to subspecies status following results of a study of their vocalizations.

Nome scientifico

Epinecrophylla haematonota

Autorità

(Sclater, PL, 1857)

Ordine

Passeriformi

Famiglia

Thamnophilidae

Genere

Epinecrophylla

Areale e habitat

The nominate subspecies E. h. haematonota of the rufous-backed stipplethroat is found in eastern Peru south of the Napo and Amazon rivers between the departments of Loreto and Madre de Dios and in the adjacent Brazilian states of Amazonas and Acre. Subspecies E. h. pyrrhonota is found in southeastern Colombia, southern Venezuela, extreme northeastern Ecuador, northeastern Peru north of the Napo and Amazon, and the northwestern Brazilian states of Amazonas and Roraima. Subspecies E. h. fjeldsaai is found in southeastern Ecuador south of the Napo and adjoining extreme north-central Peru.<p>The rufous-backed stipplethroat primarily inhabits terra firme evergreen forest. Subspecies E. h. fjeldsaai is also found in transitional forest and in lesser numbers in várzea forest. In elevation it mostly occurs below 500 m (1,600 ft) but reaches 1,300 m (4,300 ft) in Venezuela and northern Brazil and 1,100 m (3,600 ft) in Colombia. In Ecuador it reaches only 250 m (800 ft).

Migrazione

Specie stanziale

Comportamento

Comportamento migratorio: Specie stanziale.

Conservazione

Tendenza della popolazione: stabile.

Tendenza della popolazione

stabile