Riesenzaunkönig

Bestimmung

As implied by its name, the giant wren is the largest member of its family. It is 20 to 22 cm (7.9 to 8.7 in) long and weighs 43.4 to 57 g (1.53 to 2.01 oz). The sexes are similar. Adults have a black crown, nape, and shoulders. A white supercilium separates a black stripe through the eye from the crown and the rest of the face is also white. Their upperparts are bright chestnut and the tail dark chestnut; all of the tail feathers except the middle pair have a white band near the end. Their underparts from the chin to the belly are white; the belly and vent area are buff. Juveniles are similar to the adults but their underparts are whitish, not pure white.

Taxonomie

The giant wren is monotypic. Though birds in the northern part of its range are larger, the difference is too small to assign geographical subspecies.<p>It has sometimes been treated as a subspecies of bicolored wren (Campylorhynchus griseus) and may form a superspecies with it.

Wissenschaftlicher Name

Campylorhynchus chiapensis

Autorität

Salvin & Godman, 1891

Ordnung

Passeriformes

Familie

Zaunkönige (Troglodytidae)

Gattung

Campylorhynchus

Verbreitung und Lebensraum

The giant wren was formerly considered endemic to Mexico's Chiapas state, from Puerto Arista south to near the Guatemalan border. However, since approximately 2010 there have been many sightings in far northwestern Guatemala. It inhabits bushland including areas much modified by humans such as farmyards, hedgerows, and fruit orchards. It occurs only within 50 km (31 mi) of the coast and from sea level to 300 m (980 ft) of elevation.

Zugverhalten

Resident species

Verhalten

The giant wren's diet has not been documented but it is probably mostly invertebrates. It forages on or near the ground.<p>The giant wren's breeding season is May through July. It possibly double-broods and there is evidence of helpers at the nest. The nest is a bulky ball with a side entrance, constructed of straw and other coarse fiber and often placed in an acacia tree. The only recorded clutch had three eggs.<p>Giant wren pairs sing in unison, "rhythmic hollow phrases, chortling and rollicking" [1]. Its calls are "grating and harsh churring" [2].

Schutzstatus

Bestandstrend

rising