Sinaloa wren
The Sinaloa wren is a species of bird in the family Troglodytidae. It is endemic to Mexico, with almost annual sightings in the United States, in Arizona.
Taxonomy and systematics
The Sinaloa wren has three subspecies, the nominate Thryophilus sinaloa sinaloa, T. s. cinereus, and T. s. russeus.Description
The Sinaloa wren is long and weighs. The nominate adults have dull brown upperparts that become more rufescent on the rump. The tail is rufous brown with black or dusky bars. They have a white to buffy white supercilium, a black streak behind the eye, and dusky-striped white cheeks. The sides of the neck have broad black and white streaks. The throat and breast are white darkening to pale brown on the flanks. Juveniles are similar but their flanks are paler and more cinnamon and the facial markings less distinct. The adult T. s. cinereus is paler and grayer than the nominate. T. s. russeus upperparts are a deep russet brown.Distribution and habitat
The Sinaloa wren is endemic to Mexico though individuals are seen almost annually in southern Arizona. T. s. cinereus is the northernmost subspecies; it is found from northeastern Sonora south to northern Sinaloa and western Chihuahua and as a visitor to Arizona. T. s. sinaloa is found from central Sinaloa and western Durango south to Michoacán. T. s. russeus is found from centralGuerrero east to western Oaxaca. The species inhabits the understory of deciduous forest and its edges, both undisturbed and second growth. It also occurs in plantations.