Family Nightjars (Caprimulgidae)

Near Threatened

Sickle-winged Nightjar (Eleothreptus anomalus)


French: Engoulevent à faucilles German: Sichelschwingen-Nachtschwalbe Spanish: Chotacabras pantanero

Amblypterus anomalus


, 1838,

São Paulo, Brazil


Sister to E. candicans (see below). Monotypic.


S Brazil (Minas Gerais, patchily S to Rio Grande do Sul), C & S Paraguay (Concepción to Misiones) and N & NE Argentina (S to Buenos Aires). Recorded (perhaps migrating individuals) N in Brazil to Distrito Federal and Tocantins#R.

Descriptive notes

18–20 cm; one male 43·5 g. Sexually dimorphic, with differences most readily apparent in flight. Upperparts pale greyish-brown, lightly spotted dark brown,... read more


Calls include soft, repetitive “chip”, “tchup” or “tchut”, from... read more


Edges of gallery forest, along streams or rivers through gallery forest, in monte (chaco-type... read more

Food and feeding

Diet poorly studied, but includes beetles, moths and ants. Foraging methods poorly documented. Forages in flight by fluttering and gliding... read more


Poorly known. Breeds possibly Aug–Jan in SE Brazil (Aug in Paraná, Nov to early Jan in São Paulo) and Sept–Dec in... read more


Very poorly known. May be migratory in parts of range, S populations moving N during non-breeding... read more

Status and conservation

Not globally threatened. Currently considered Near-threatened. Very scarce and little known throughout range, though possibly under-recorded in many regions. In Brazil,... read more

Recommended citation

Cleere, N. & Kirwan, G.M. (2018). Sickle-winged Nightjar (Eleothreptus anomalus). 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 17 March 2018).