Sinaloazaunkönig Thryophilus sinaloa

Small skulking wren of lowlands and foothills in west Mexico. Favors thorn forests, plantations, and thickets, often in slightly more open situations than Happy Wren. Heard more often than seen. Song a powerful series of rich whistles, quite different from Happy Wren song. Scolding calls vary, but does not make "comb trill" of Happy. Plumage rather plain, with bold white eyebrow and indistinct stripes on sides of neck; no similar-looking species in its range.