Family Tyrant-flycatchers (Tyrannidae)

Least Concern

Blue-billed Black-tyrant (Knipolegus cyanirostris)


French: Ada à bec bleu German: Einfarbdunkeltyrann Spanish: Viudita picoceleste

Muscicapa cyanirostris


, 1818,





SE Brazil (N to Minas Gerais and Espírito Santo), Uruguay and NE Argentina (Misiones S to N Buenos Aires); S populations winter N to SC Brazil (Mato Grosso do Sul) and E Paraguay.

Descriptive notes

14·5–15 cm. Male plumage is all glossy black, except for faint white edges on underwing (remiges); iris bright red; bill pale blue bill with black tip; legs black.... read more


Generally quiet; barely audible “it” call while perched.


Bor­ders of humid forest and gallery woodland, less often venturing out into shrubby semi-open... read more

Food and feeding

Insects. Usually in pairs, often inconspicuous. Generally perches at low levels; occasionally takes high exposed perch for protracted... read more


Little known. Nov–Dec in Argentina. Male, with wings raised, glides silently down in front of female. Nest an open cup made of small... read more


Austral migrant; those breeding in S of range mainly migrate N as far as Paraguay and SC Brazil (... read more

Status and conservation

Not globally threatened. Uncommon to locally common or abundant. Appears to be most numerous in SE Brazil, e.g. Rio Grande do Sul. Recorded in Mata dos Godoy State Park (... read more

Recommended citation

Farnsworth, A. & Langham, G. (2019). Blue-billed Black-tyrant (Knipolegus cyanirostris). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 12 December 2019).