Grisin à gorge tachetée

Identification

The brown-bellied stipplethroat is 9.5 to 10.5 cm (3.7 to 4.1 in) long and weighs 7.5 to 9.5 g (0.26 to 0.34 oz). Adult males have a mostly gray face and a black throat with white spots. They have a olive-brown crown, upperparts, tail, and flight feathers. Their wing coverts are a darker olive-brown with small white tips. Their breast and upper belly are gray that becomes gray with a clay-colored tinge towards the vent area. Adult females have a mostly pale brownish buff face and throat. Their crown and upperparts are yellowish olive-brown and their tail reddish. Their wing coverts have pink or pinkish buff tips. Their underparts are pale brownish buff that is darker on the flanks and crissum. Juveniles have large spots on the wing coverts that almost form a continuous band.

Taxonomie

The brown-bellied stipplethroat was described by the English ornithologists Philip Sclater and Osbert Salvin in 1881 and given the binomial name Myrmotherula gutturalis. Based on genetic and vocal studies it and seven other members of the genus were moved to the genus Epinecrophylla that was created in 2006. All were eventually named "stipplethroats" to highlight a common feature and to set them apart from Myrmotherula antwrens.<p>The brown-bellied stipplethroat is monotypic.

Nom scientifique

Epinecrophylla gutturalis

Autorité

(Sclater, PL & Salvin, 1881)

Ordre

Passériformes

Famille

Thamnophilidés

Genre

Epinecrophylla

Répartition et habitat

The brown-bellied stipplethroat is found from eastern Venezuela east through the Guianas and south in Brazil to the Amazon River from the Rio Branco and lower Rio Negro to the Atlantic. It inhabits the understorey of terra firme evergreen forest from sea level to 1,000 m (3,300 ft) though it mostly occurs below 600 m (2,000 ft).

Migration

Resident species

Comportement

The brown-bellied stipplethroat is believed to be a year-round resident throughout its range.<p>The brown-bellied stipplethroat's diet is not known in detail but includes insects and spiders. It typically forages singly or in pairs, and usually as part of a mixed-species feeding flock. It mostly forages in the forest understory; some studies found that it seldom exceeds 9 m (30 ft) above the ground but others have noted it feeding as high as 15 m (50 ft). It forages mostly in vine tangles, on hanging clusters of dead leaves and in dead leaves and other debris trapped in the vines.<p>Male brown-bellied stipplethroats display to each other from perches less than 1 m (3 ft) apart; they puff up their back plumage, flare their throat feathers, sway back and forth, and continuously vocalize.<p>The brown-bellied stipplethroat's breeding season is not well known but appears to vary geographically. It nests in February and March in French Guiana and (possibly not continuously) from May to December in Brazil. Nests in French Guiana were a deep pouch of plant and fungal fibers and dead leaves suspended from the fork of a thin branch about 1.5 m (5 ft) above the ground. One in Brazil was a domed ball of twigs and leaves low to the ground in a bush. The clutch size is two eggs. The incubation period is not known; fledging occurs about 11 days after hatch. Both parents incubate the clutch and brood and provision nestlings.<p>The brown-bellied stipplethroat's song is an "extr. high, thin, shivering, descending 't-srrrrrruw' ". Its calls include a "distinctive 'chip' followed by a series of c. 5 notes that rise and fall in pitch and intensity", a "single downslurred note", and a "rubbery rattle rising and falling in pitch and intensity".

Conservation

Tendance de la population

declining