Known from the discs' own bird lists
Sickle-winged Nightjar
eleothreptus anomalus
Caprimulgidae,Caprimulginae
- Disc 2 · 2001 listed
- Disc 3 · 2006 listed
- Disc 1 · 2011 listed
The detailed account of this bird below comes from Disc 1 · 2011. The other discs list the bird but carry no account of it, and none is invented here.
From the original Disc 1 · 2011 revision
Detailed account — Disc 1 · 2011
This detailed account first appears in the 2011 Disc 1 revision; the earlier releases have no account for this bird.
Description Disc 1 · 2011
18-20 cm. Upperparts pale gray brown lightly spotted dark brown and boldly spotted blackish on head; wing coverts gray brown, barred blackish and streaked pale buff showing a distinct cinnamon patch distally edged white on the primary coverts; scapulars pale gray brown with irregularly shaped blackish centres; a pale buff stripe above the eye; underparts dark brown tinged cinnamon, barred brown, becoming pale buff indistinctly barred on the lower belly and flanks; the male has a distinctive wing shape with curved outer primaries tipped white and all but the central tail feathers broadly tipped white; the female is browner; iris dark brown.
The immature has the upperparts tinged more cinnamon and speckled white but is otherwise like the female.
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The disc records this picture against the bird without a caption. Disc 1 · 2011
The account, continued
Voice Disc 1 · 2011
Calls a weak repetitive "chip" an "tchut" from ground or in flight; female a harsh nasal "gzee..gzee..".
Behavior Disc 1 · 2011
Forages by flying low over open areas.
Habitat and status Disc 1 · 2011
Rare in edges of gallery forest, grassland along streams, savannah, marshland. rarely scrubby edges of lagoons, campo rupestre, chaco-type woodland (monte).
Distribution Disc 1 · 2011
Historically recorded from Fazenda Pedras, Rio Pedras, Paranaciacaba, Mogi das Cruzes, Poa, São Jose dos Campos, Orissanga, Ipanema, Alambari, Itarare (119). Occurs in the Estacao Experimental de Itapetininga (http://www.iflorestsp.br/body.htm) near Aracoiaba da Serra west of Sorocaba.
Taxonomy notes Disc 1 · 2011
Identification of the male in flight on the basis of the wing shape is not possible, even by daylight. However the birds have an unusual flight action featuring very fast wing beats reminiscent of an injured bird. This species is very small with a large head. The barring on the underside is also a useful field identification feature. When sitting on the ground the primaries are held in a gentle upwards-arch reaching halfway along the length of the tail.
The Disc 2 · 2001 contains no detailed account for this bird (its 2011 account is shown above). None is invented here.
The Disc 3 · 2006 contains no detailed account for this bird (its 2011 account is shown above). None is invented here.
Vocalizations
Each disc's own recording entries are shown under that disc's label. A player appears only where the recording's file survives on a preserved disc.
Disc 2 · 2001
Calls. Serra da Canastra, 11/12/98. No wind, clear night, 22°C. 0n road, grassy plains. Disc 2 · 2001
Audio file found on Disc 1 (2011). The asserting release's own preserved disc did not carry it; the historical assertion above is unchanged.
Disc 1 · 2011
Calls. Serra da Canastra, 11/12/98. No wind, clear night, 22°C. 0n road, grassy plains. Disc 1 · 2011
Which discs list this bird
- Disc 2 · 2001 — in this disc's bird list
- Disc 3 · 2006 — in this disc's bird list
- Disc 1 · 2011 — in this disc's bird list
How that was established
- Disc 2 · 2001
aux_nonzero- Disc 3 · 2006
aux_nonzero- Disc 1 · 2011
aux_nonzero
The disc's own record fields that place the bird on its list: a non-empty entry in the species table, and the byte that marks it as selected on a local checklist.
Historical checklist participation
Disc 2 · 2001
Listed on product/edition lists: SEBRAZIL.CKD; SEBZ_D1.CKD
Disc 3 · 2006
Listed on product/edition lists: SEBZ_D1.CKD; Sebrazil.ckd
Disc 1 · 2011
Listed on product/edition lists: SEBZ_D1.CKD; Sebrazil.ckd