Dusky-throated Antshrike

Identificazione

The dusky-throated antshrike is 13 to 14 cm (5.1 to 5.5 in) long and weighs 16 to 19 g (0.56 to 0.67 oz). Adult males of the nominate subspecies are mostly darkish gray that is lighter on their belly. They sometimes have a small white patch between their scapulars and often some black feathers on their throat. Their wings and tail are darkish gray with small white tips on the tail feathers. Adult females have dark olive-brown upperparts with more rufous wings and tail. Their throat is buff-white and the rest of their underparts pale buffy ochraceous. Subspecies T. a. obidensis has a shorter tail than the nominate, a black throat, and sometimes some white on the wings.

Tassonomia

The dusky-throated antshrike was described by the English ornithologists Philip Sclater and Osbert Salvin in 1868 and given the binomial name Dysithamnus ardesiacus. Its current genus Thamnomanes was introduced by the German ornithologist Jean Cabanis in 1847. The name combines the Ancient Greek words thamnos "bush" and -manēs "fond of". The species was moved to Thamnomanes by the early 21st century.<p>The dusky-throated and saturnine antshrike (T. saturminus) were treated as conspecific by many twentieth century authors and now are considered to form a superspecies. <p>The dusky-throated antshrike has two subspecies, the nominate T. a. ardesiacus (Sclater, PL &amp; Salvin, 1868) and T. a. obidensis (Snethlage, E, 1914).

Nome scientifico

Thamnomanes ardesiacus

Autorità

(Sclater, PL & Salvin, 1868)

Ordine

Passeriformi

Famiglia

Thamnophilidae

Genere

Thamnomanes

Areale e habitat

The nominate subspecies of the dusky-throated antshrike is found east of the Andes from south-central and southeastern Colombia south through eastern Ecuador into eastern Peru and northeastern Bolivia and in far western Brazil's Acre state. Subspecies T. a. obidensis is found from eastern Colombia east through eastern and southern Venezuela and the Guianas, and in northern Brazil from the Rio Negro watershed to the Atlantic and south of the Amazon between the rios Tefé and Purus. The species primarily inhabits the understorey of terra firme evergreen forest and occurs less often in várzea forest. In elevation it reaches 1,050 m (3,400 ft) though only as high as 400 m (1,300 ft) in Colombia and is mostly below 500 m (1,600 ft) in Ecuador.

Migrazione

Specie stanziale

Comportamento

Comportamento migratorio: Specie stanziale.

Conservazione

Tendenza della popolazione: in diminuzione.

Tendenza della popolazione

in diminuzione