Velvety Black-Tyrant
knipolegus nigerrimus
Tyrannidae,Fluvicolinae · Fluvicoline Flycatchers
- Disc 2 · 2001 listed
- Disc 3 · 2006 listed
- Disc 1 · 2011 listed
The account
Description
17 cm. Short crest. Bill bluish gray. Iris dark red.
Male is glossy blue black with white bases to the primaries showing as a white band in flight.
Female is identical except for chestnut streaks on the throat.
Bigger than Knipolegus cyanirostris.
-
The disc records this picture against the bird without a caption. Disc 3 · 2006
Where it was recorded
The discs' own checklists select Velvety Black-Tyrant at 8 localities.
- Campos do Jordão CASB
- Ilha São Sebastião SSSB
- Parati PARB
- Reserva Ecológica Guapiacú RERB
- Rio de Janeiro RIRB
- Serra Bocaina SESB
- Serra dos Orgãos SRRB
- Serra dos Tucanos SDTC
How the map was made
The original program computed each red dot at display time from the locality's coordinates, using its map library and one of five base maps drawn for the screen widths of the day. That library's projection — an oblique rotation of the sphere about the map's own centre, 23.7°S 47.4°W — was read from the program and checked against the graticule the same program drew into the base maps: it reproduces every grid intersection to within about a pixel. The dots here use that projection on the 1280-pixel base map, with the coordinates the discs record. Nothing was placed by hand, no modern map data was used, and a place whose coordinate is incomplete, out of range or beyond the map's edge is listed rather than guessed.
The discs carried location maps only; none shows a distribution or range.
The account, continued
Voice
Usually silent.
Behavior
Hawks for prey from vantage points and also performs perch to ground sallies. Seems to be more conspicuous than Knipolegus cyanirostris.
Habitat and status
A Knipolegus of the high mountains. Quite common near the tree limit in mountains on bush-covered rocky slopes and grassland.
Distribution
High mountains of southeast Brazil:Serra Mantiqueira, Serra dos Orgãos. In the city of Rio de Janeiro on Corcovado, Pico da Tijuca, Pico da Gávea (40). Usually 1800-2300 meters, but in bad weather down to 1600 meters in Itatiaia (Remold).
Decoded from the disc's own bytes. Each part is shown under the heading the disc files it under, and the wording, spelling and punctuation are the author's.
Across the three discs
The work was published on three discs — Disc 2 in 2001, Disc 3 in 2006 and Disc 1 in 2011. Where they differ, that is a difference between historical releases, and it is never merged away. The 2011 disc is not treated as correcting the earlier ones.
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;local_checklist_byte45_flag_1- Disc 3 · 2006
aux_nonzero;local_checklist_byte45_flag_1- Disc 1 · 2011
aux_nonzero;local_checklist_byte45_flag_1
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.
The account in the Disc 1 · 2011 revision
The 2011 Disc 1 revision carries this account text unchanged from the Disc 3 release.
The work's own taxonomy
The discs carried three parallel name schemes. All three are shown as recovered; none is a modern taxonomy and none has been updated.
| Scheme | Scientific name | English name | Family |
|---|---|---|---|
| WORLD | knipolegus nigerrimus | Velvety Black-Tyrant | Tyrannidae,Fluvicolinae |
| CLEMENTS | knipolegus nigerrimus | Velvety Black-Tyrant | Tyrannidae,Fluvicolinae |
| AOU_HM | knipolegus nigerrimus | Velvety Black-Tyrant | Tyrannidae,Fluvicolinae |
Source details
- Identifier on this site
- seb_species_0256
- Account identifier
- seb_account_0256
- Account number on the disc
- 256
- Source edition
- CD03 / 2006 package
- Original taxonomy scheme
- WORLD
- Structure status
- heuristic; decoded_account_text and segment JSON remain authoritative