Tapaculo di Zimmer

Scytalopus zimmeri

Tapaculo distintivo della foresta umida montana adiacente al limite della vegetazione arborea e della foresta di Polylepis nelle alte Ande nel nord-ovest dell'Argentina e nel sud della Bolivia. La gola bianca vistosa lo distingue dagli altri tapaculo eccetto il Tapaculo dalle sopracciglia bianche, dal quale si differenzia per la voce e la parte posteriore della corona grigia (non marrone). Generalmente osservato più all'aperto rispetto ad altri tapaculo, spesso posato su rocce e vegetazione a livello del suolo. Il canto è una serie rapida di due note secche distanziate, poi 3-4 note secche veloci: “pik-pik pr-tr-tr”.

Identificazione

Zimmer's tapaculo is 10.5 cm (4.1 in) long. Males weigh 17.6 to 19.9 g (0.62 to 0.70 oz) and one female weighed 15.9 g (0.56 oz). The adult's most striking feature is its white supercilium, throat, and upper breast. The rest of the head, the back, and the wings are gray with a brown wash on the back. The lower breast and belly are also gray. Its flanks and vent are olive-brown and have dusky bars. The juvenile's supercilium is faint buff, its upper parts olive-brown with dusky bars, its breast and upper belly gray, and the flanks and lower belly are buff with dusky bars.

Tassonomia

Zimmer's tapaculo has at times been considered a subspecies of Magellanic tapaculo (Scytalopus magellanicus). It and white-browed tapaculo (S. superciliaris) form a superspecies. Its name commemorates American ornithologist John Todd Zimmer.

Nome scientifico
Scytalopus zimmeri
Autorità
Bond, J & Meyer de Schauensee, 1940
Ordine
Passeriformi
Famiglia
Rinocriptidi
Genere
Scytalopus

Areale e habitat

Zimmer's tapaculo is found in southern Bolivia's Chuquisaca and Tarija departments and Argentina's Jujuy and Salta provinces. It ranges the Andean slopes from 1,700 to 3,200 m (5,600 to 10,500 ft) elevation. It inhabits several vegetative communities including seasonally humid Alnus, Podocarpus, and Polylepis woodlands where it frequents ravines and other shady areas, and also open wet rocky slopes with bunch grass and shrubs.

Migrazione
Resident species

Comportamento

Zimmer's tapaculo forages on and near the ground, often staying hidden among roots, rocks, and ferns. Its diet is not well known but it appears to favor seeds.<p>Both members of a Zimmer's tapaculo pair were observed tending nestlings in October. The nest was found in a crevice of an earth and stone bank.<p>The song of Zimmer's tapaculo is a series three to five burry notes repeated at intervals, often for many minutes [1]. Its call is described as one or two "quick" notes repeated at intervals [2].

Conservazione

Tendenza della popolazione
stable

Foto

Distribuzione

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