Giant Wren
Campylorhynchus chiapensis
Very large wren restricted to coastal plain of Chiapas and adjacent Guatemala. Favors open and semiopen areas with hedges, scattered large trees, stone walls, and thickets; often in and around villages and in gardens of small farms. Forages from the ground to the canopy of palm trees, mainly at low to middle levels. Occurs alongside somewhat smaller, but rather similar rufous-backed form of Rufous-naped Wren. Note Giant’s plain rufous back and wings and rufous tail (Rufous-naped Wren has boldly barred wings andblackish tail). Despite large size, can be elusive, like all wrens.
Identification
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.
Taxonomy
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.
- Scientific name
- Campylorhynchus chiapensis
- Authority
- Salvin & Godman, 1891
- Order
- Passeriformes
- Family
- Troglodytidae
- Genus
- Campylorhynchus
Range and habitat
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.
- Migration
- Resident species
Behavior
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].
Conservation
- Population trend
- rising
Photos
Distribution
Bird Calls
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Black-headed Mountain Greenbul
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Medium-sized chunky greenbul with a broken pale eye-ring. Note the black cap, a vaguely striped cheek, and gray underparts. Common and conspicuous in montane forest. Often joins mixed flocks with other bird species. The song is a short series of barking and mewing notes. Similar to Olive-headed Greenbul, but separated by the dark eye, the less distinct cheek striping, and the black rather than olive-green crown.
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