Small, compact, and highly active tyrant flycatcher measuring approximately 10–11 cm in length, easily recognized by its crest of black feathers, behind which it conceals a small white crown that it may display when alarmed. The forehead and face are grayish with fine whitish streaks, and it has a short white eyebrow, a dark iris, and a black bill with a yellowish or orange base to the lower mandible. The upperparts are grayish brown, the wings show two conspicuous whitish wingbars, and the underparts are whitish to yellowish, with heavy black streaking on the throat and breast. The sexes are similar. Juveniles are less contrasting, with a shorter crest and buffier wingbars.
It may widely coexist with the Black-billed Tit-Tyrant (Anairetes parulus), from which it differs mainly in that the latter has a pale iris, a completely black bill, and a crest that is generally more strongly curved forward.
Geographic distribution: A species widely distributed from northern Peru and Bolivia southward to central and southern Argentina, also reaching the extreme north of Chile. Four subspecies are recognized: huancabambae, in northern Peru; cuzcoensis, in southeastern Peru; arequipae, in southern Peru and the extreme north of Chile; and flavirostris, present in Bolivia and much of Argentina. In Argentina, it ranges from Jujuy and Salta south to northern Chubut. It is frequent in the mountainous west, the Sierras Centrales, and the Monte, also reaching northern Patagonia.
During the austral winter, part of the southern populations move northward and eastward, being regularly recorded in Buenos Aires, Entre Ríos, Santa Fe, and lower-elevation areas of Córdoba. It probably also undertakes altitudinal movements in Andean areas of the northwest. It occurs from sea level to approximately 3,500 m above sea level.
Habitat: It primarily inhabits open environments with abundant shrubs, such as arid and semi-arid scrublands, jarilla shrublands, ravines, and shrublands of the Monte Ecoregion and its ecotones. In the northwest, it occupies prepuna environments, cardón stands, and high-elevation arid ravines, reaching high-Andean areas with scattered shrubs, and also uses open queñoa woodlands and the edges of montane forests. In the Sierras Centrales, it occurs in the Serrano Chaco and high-elevation shrublands. In Patagonia, it frequents ravines, shrublands, and Monte environments, locally extending into the steppe and urbanized areas. During the austral winter, migratory populations frequently use chilca thickets and riparian scrublands in central and eastern Argentina.
Diet: It feeds primarily on small arthropods, especially insects and spiders, although it occasionally also consumes grass seeds. It forages very actively among branches and foliage, capturing prey through short flights between stems and brief pursuit flights.
Behavior: A very active and restless but relatively confiding species. It is usually observed alone, in pairs, or in small family groups, and occasionally joins mixed-species flocks. It constantly moves among shrubs through short flights and small hops, making frequent pauses to inspect the foliage. While foraging, it often holds its wings slightly drooped and repeatedly moves its tail. Its most common vocalizations consist of fine trills and ascending notes, while the song includes brief phrases followed by a characteristic prolonged trill. Crest-raising and exposure of the white crown appear to play an important role in social interactions and possibly also during courtship and reproductive interactions.
Nesting: It builds a small, deep cup-shaped nest using plant fibers, lichens, feathers, and abundant soft material, generally placed close to the ground within dense shrubs. The clutch consists of two to three white eggs.
Conservation status: The species is categorized as Not Threatened (NA) at the national level and as Least Concern (LC) at the international level. It is common throughout much of its range and faces no significant known threats, while also showing good tolerance of modified environments. Its broad distribution and ecological flexibility favor the stability of its populations.
Author of this compilation: María Belén Dri and Diego Carús – 21/07/2026