Nava's Wren

The Nava's wren, a member of the Troglodytidae family, is a bird of modest stature, measuring 16 cm (6.3 inches) in length. A specimen of the female persuasion tipped the scales at 29.3 grams (1.03 ounces). This avian exhibits a rich brown crown and upperparts, complemented by a tawny visage. Its throat and upper chest are adorned with a whitish hue, which gracefully transitions to a pale gray on the lower chest and a gray-brown at the vent. The lower chest is subtly marked with faint scalloping, while the flanks boast a sooty brown coloration.

Identification Tips

When endeavoring to identify Nava's wren, look for its rich brown upperparts and tawny face. The whitish throat and upper chest, with a transition to pale gray and gray-brown towards the vent, are distinctive. The faint scalloping on the lower chest and sooty brown flanks are also key characteristics to observe.

Habitat

Nava's wren is a denizen of undisturbed forests, favoring the outcrops of Karst limestone. It thrives at elevations ranging from 75 to 800 meters (246 to 2,625 feet), a testament to its adaptability within a specific ecological niche.

Distribution

This species is endemic to Mexico, with its presence confined to a small area in the southern part of the country. It can be found in southeastern Veracruz, western Chiapas, and just into northeastern Oaxaca.

Behaviour

While foraging, Nava's wren is often observed on the ground, particularly amongst rocks and on rock faces, suggesting a preference for invertebrates as its primary diet.

Song & calls

The male of the species serenades with a varied, often stuttering warble of mellow whistles, while the female's song is characterized by an introductory note followed by a rapid series of 8 or more loud whistles. Their call is a distinctive metallic 'tink'.

Conservation status

The IUCN has classified Nava's wren as Vulnerable, with the species facing a small and declining range. The estimated population of adults is fewer than 7000, highlighting the need for conservation efforts to ensure the survival of this unique bird.