Colaespina gorgicana

Identificación

The hoary-throated spinetail is 14.5 to 16 cm (5.7 to 6.3 in) long. The sexes have the same plumage. Adults have grayish lores, dark rufous cinnamon ear coverts, and a rufous streak behind the eye. Their crown is gray-brown and their nape, back, rump, and uppertail coverts bright rufous. Their wings are rufous with dusky tips on their flight feathers. Their tail is rufous. Their throat is dull black with white tips on the feathers. Their underparts are mostly rufous cinnamon with pale ochraceous lower flanks and buffy or pale cinnamon-white in the center of their belly. Their iris is dark reddish brown, their maxilla blackish gray, their mandible blue-gray with a blackish tip, and their legs and feet blue-gray.

Taxonomía

The hoary-throated spinetail was originally described in genus Synallaxis. In the early twentieth century some authors moved it into the newly created genus Poecilurus. By 2000 the merger of Poecilurus into Synallaxis was generally accepted and a study published in 2011 confirmed that placement. That study also established that the hoary-throated spinetail is a sister species to the white-whiskered spinetail (S. candei) and the rufous-breasted spinetail (S. erythrothorax).<p>The hoary-throated spinetail is monotypic.

Nombre científico

Synallaxis kollari

Autoridad

Pelzeln, 1856

Orden

Passeriformes

Familia

Furnariidae

Género

Synallaxis

Distribución y hábitat

The hoary-throated spinetail has a very restricted range in the extreme northern Amazon Basin. It is found only along several tributaries of the Branco River in the Brazilian state of Roraima and Guyana's Upper Takutu-Upper Essequibo Region. It inhabits gallery forest along the watercourses, which flow through grasslands called "Lavrado" in Brazil and the Rupununi savannah in Guyana. The total length of the narrow bands it inhabits is less than 600 km (370 mi). It favors dense undergrowth heavy with vines and Inga shrubs.

Migración

Resident species

Comportamiento

The hoary-throated spinetail is a year-round resident.<p>Nothing is known about the hoary-throated spinetail's diet or foraging behavior, though it is assumed to feed on arthropods like other Synallaxis spinetails.<p>Nothing is known about the hoary-throated spinetail's breeding biology. It is assumed to build a stick nest similar to those of other Synallaxis spinetails.<p>The hoary-throated spinetail makes a "double-noted 'tuh-tih', the second note higher". It is not known if this is a song or a call.

Conservación

Tendencia poblacional

declining