Nava's wren

Nava's wren (Hylorchilus navai) is a species of bird in the family Troglodytidae. It is endemic to Mexico.

Taxonomy and systematics
Nava's wren was originally treated as a subspecies of Hylorchilus sumichrasti, which at that time was called slender-billed wren. After the split, the now-monotypic H. sumichrasti was renamed Sumichrast's wren. Nava's wren is also monotypic.

Description
Nava's wren is 16 cm long; a female weighed 29.3 g. The adults have a rich brown crown and upperparts and a tawny face. Their throat and upper chest are whitish that transitions to pale gray on the lower chest and gray-brown at the vent. The lower chest has faint scalloping and the flanks are sooty brown.

Distribution and habitat
Nava's wren occurs in a small area of southern Mexico, in southeastern Veracruz, western Chiapas, and barely into northeastern Oaxaca. It inhabits undisturbed forest with outcrops of Karst limestone between the elevations of 75 and 800 m.

Feeding
Though no dietary data are available for Nava's wren, it probably feeds mostly or entirely on invertebrates. It forages on the ground, especially among rocks and on rock faces.

Breeding
The breeding phenology of Nava's wren has not been documented.

Vocalization
The male Nava's wren sings "a varied, often stuttering warble of mellow whistles". The female's song is "an introductory note followed by rapid series of 8 or more loud whistles". The species' call is "a metallic 'tink'".

Status
The IUCN has assessed Nava's wren as Vulnerable "owing to its small and declining range" and that its population is estimated to be fewer than 7000 adults.