Jerdon's Babbler

Identificazione

Measuring 16–17 cm in length, it is quite intermediate in habitus between certain typical warblers (Sylvia) and the parrotbills (Paradoxornis). Like these, it is a drab bird with a long tail used to balance when creeping through the vegetation; its bill is thicker than in Sylvia but not as heavy as in Paradoxornis. Buffy chestnut brown above and a slightly lighter yellowish-brown on the belly, its lores are pale greyish, as are the throat and breast. The tail and a wing patch are redder than the rest of the upperside. The legs and feet are dark, the bill is greyish-horn colored above and pale below; the eyes' irides are yellowish-brown and a thin nude ring of greenish-yellow skin surrounds the eye. The sexes are alike; young birds have a more orange hue to the upperside plumage, and the lower bill is pink. Differences between subspecies are slight, with the central population essentially having richer chestnut brown and darker grey colours.<p>Its relative, the yellow-eyed babbler (C. sinense), looks like a brighter version of the same but has somewhat more vivid colors, with white replacing grey in the plumage, an additional white supercilium, yellowish legs, feet and irides, and an orange-yellow eye-ring.

Tassonomia

Chrysomma altirostre was the scientific name proposed by Thomas C. Jerdon in 1862 for a pale reddish brown babbler collected near Thayetmyo in northern Myanmar. Pyctorhis griseigularis proposed by Allan Octavian Hume in 1877 was a ferruginous red babbler collected in the Dooars of Bhutan. Pyctorhis altirostris scindicus proposed by Herbert Hastings Harington in 1915 was an earthy brown babbler from Sukkur in Sindh, Pakistan.<p>Three subspecies are recognized, based mainly on their allopatric ranges:

Nome scientifico

Chrysomma altirostre

Autorità

Jerdon, 1862

Ordine

Passeriformi

Famiglia

Paradoxornithidae

Genere

Chrysomma

Areale e habitat

Jerdon's babbler lives all-year-round near river courses, where it inhabits dense reedbeds and tall grasslands consisting of cogongrass (Imperata cylindrica), common reed (Phragmites) and reedmace (Typha) species. In Pakistan, it occurs along the Indus and its tributaries. In Punjab, India, it was recorded in Harike Wildlife Sanctuary.In the Terai, it was recorded in Shuklaphanta National Park and Dudhwa National Park.In northeast India, it was sighted in Kaziranga, Orang, Manas and Dibru-Saikhowa National Parks, Majuli, and D'Ering Memorial Wildlife Sanctuary.In Myanmar, it was thought to be extinct, but rediscovered in May 2014 in the lower Ayeyarwady floodplain near Yangon.<p>Plants dominating its favorite habitat are typically tall reeds several meters in height. In the Indus River basin, it is associated with hardy sugarcane (Tripidium arundinaceum) and kans grass (Saccharum spontaneum). In the dooars, it also lives in stands of ravennagrass (Tripidium ravennae). On the other hand, sugarcane plantings or other single-species reedbeds as well as lower growth are not very attractive to the species. Other plants, typically grasses, are found to a lesser extent in the bird's haunts, including satintails, giant cane (Arundo donax), vetiver or khus (Chrysopogon zizanioides), Desmostachya bipinnata and Themeda arundinacea.

Migrazione

Specie stanziale

Comportamento

Comportamento migratorio: Specie stanziale.

Conservazione

Tendenza della popolazione: in diminuzione.

Tendenza della popolazione

in diminuzione