Coda spinosa dell'Araguaia

Identificazione

The Araguaia spinetail is 15 to 16 cm (5.9 to 6.3 in) long. The sexes have the same plumage. Adults have dull whitish lores on an otherwise brownish gray face. Their crown is grayish brown, their mantle, back, and rump bright rufous, and their uppertail coverts dark rufous. Their wings are bright rufous with fuscous-brown tips on the flight feathers. Their tail is dark rufous; it is graduated and the feathers have blunt tips. Their throat is white; their underparts are mostly tan with a whitish center on a paler belly. Their iris is cinnamon brown, their maxilla black to dark gray, their mandible gray, and their legs and feet gray to dull brownish.

Tassonomia

The Araguaia spinetail has at times been treated as a subspecies of the white-lored spinetail (S. albilora), and both have also been treated as subspecies of the plain-crowned spinetail (S. gujanensis). Starting in 2016 with BirdLife International, taxonomists accepted it as a species in its own right. The International Ornithological Committee and the Clements taxonomy made the change in 2023. However, the South American Classification Committee of the American Ornithological Society has not done so.<p>The Araguaia spinetail is monotypic.

Nome scientifico

Synallaxis simoni

Autorità

Hellmayr, 1907

Ordine

Passeriformi

Famiglia

Furnariidae

Genere

Synallaxis

Areale e habitat

The Araguaia spinetail is found in east-central Brazil along the Araguaia River and some of its tributaries, in northwestern Goiás, southwestern Tocantins, southeastern Pará, and northeastern Mato Grosso. It inhabits landscapes very near water including gallery forest, riparian woodland and scrublands, and river islands. It occurs below 1,000 m (3,300 ft) of elevation.

Migrazione

Resident species

Comportamento

The Araguaia spinetail is a year-round resident.<p>The Araguaia spinetail's diet has not been studied. It usually forages in pairs, in vines and tangles in the understorey, mostly up to about 2 m (7 ft) above the ground. It gleans its prey from foliage and small branches.<p>The Araguaia spinetail's nest is a mass of sticks with a horizontal entrance tunnel placed near the ground in a shrub or small tree. Nothing else is known about its breeding biology.<p>The Araguaia spinetail's song is a "single nasal downslurred note keeeu, repeated at intervals of 1‒3 seconds". It also makes a "nasal single disyllabic note ki-eet". Both sexes sing. They sing mainly in the morning, and from a hidden perch in vegetation.

Conservazione

Tendenza della popolazione

declining