Giant Wren

The giant wren, known scientifically as Campylorhynchus chiapensis, stands as the largest member of the Troglodytidae family. This robust bird measures between 20 to 22 cm in length and tips the scales at 43.4 to 57 grams. Both male and female exhibit similar plumage, characterized by a striking black crown, nape, and shoulders. A distinct white supercilium contrasts with the black eye stripe, while the face is predominantly white. The upperparts dazzle with a bright chestnut hue, and the tail mirrors this with a dark chestnut color, save for a white band near the end of all but the central tail feathers. The underparts are white, transitioning to a buff color around the belly and vent.

Identification Tips

When identifying the giant wren, look for the contrasting black and white head pattern, the chestnut upperparts, and the unique white band on the tail feathers. The bird's size is also a distinguishing feature, as it is notably larger than other wrens.

Habitat

The giant wren is a versatile species, inhabiting bushland and thriving in areas heavily influenced by human activity, such as farmyards, hedgerows, and fruit orchards. It is a coastal dweller, found within 50 km of the shoreline and at elevations from sea level up to 300 meters.

Distribution

Originally thought to be endemic to Chiapas in Mexico, the giant wren has expanded its known range to include northwestern Guatemala. Sightings have increased in this region since around 2010.

Behaviour

While the specific diet of the giant wren has not been thoroughly documented, it is believed to primarily consume invertebrates, foraging on or near the ground. During the breeding season, which spans from May through July, the species may produce multiple broods and has been observed to have helpers at the nest. The nest itself is a substantial structure made of straw and other coarse materials, often situated in an acacia tree.

Song & calls

The vocal repertoire of the giant wren includes a duet sung by pairs, described as "rhythmic hollow phrases" that are both "chortling and rollicking." Their calls are characterized by a "grating and harsh churring."

Breeding

The breeding season of the giant wren is from May to July. Evidence suggests the possibility of double-brooding and the presence of helpers at the nest. The nest is a bulky ball with a side entrance, typically placed in an acacia tree. Recorded clutches have contained three eggs.

Similar Species

The giant wren may be confused with the bicolored wren (Campylorhynchus griseus), with which it has been treated as conspecific in the past and may form a superspecies.

Diet and Feeding

Though not fully documented, the giant wren likely feeds predominantly on invertebrates, foraging close to the ground.

Conservation status

The IUCN has classified the giant wren as Least Concern. The species boasts a population that is suspected to be stable, exceeding 20,000 individuals without any significant declines or threats noted.