Spectacled Tyrant
hymenops perspicillatus
Tyrannidae,Fluvicolinae · Fluvicoline Flycatchers
- Disc 2 · 2001 listed
- Disc 3 · 2006 listed
- Disc 1 · 2011 listed
The account
Description
13 cm. A spectacular long legged marsh tyrant. Both sexes have yellow wattles around the eye and a yellow iris.
Male is black with white primaries.
Female is grayish-brown with streaks on the back and chest. Wings with two buff wing bars and rusty primaries forming a patch. Belly yellowish.
-
Male Disc 3 · 2006 -
Female Disc 3 · 2006
Each plate is labelled with the disc's own caption.
Where it was recorded
The discs' own checklists select Spectacled Tyrant at 2 localities.
- Iguape IGSB
- Serra da Cantareira SRSB
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
Sick (30) reports that it performs perpendicular flight 5-10 meters into the air in the breeding season which produces a loud humming sound. Then throws itself on back and does a somersault. Finally, while descending gives a 'zheeee'.
Behavior
Perches on low shrubs or fences. Walks and hops over mud. Catches insects on the ground and in flight (30).
Habitat and status
Extralimital. An inhabitant of marshes and open shrubby areas near water.
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 | hymenops perspicillatus | Spectacled Tyrant | Tyrannidae,Fluvicolinae |
| CLEMENTS | hymenops perspicillatus | Spectacled Tyrant | Tyrannidae,Fluvicolinae |
| AOU_HM | hymenops perspicillatus | Spectacled Tyrant | Tyrannidae,Fluvicolinae |
Source details
- Identifier on this site
- seb_species_0258
- Account identifier
- seb_account_0258
- Account number on the disc
- 258
- Source edition
- CD03 / 2006 package
- Original taxonomy scheme
- WORLD
- Structure status
- heuristic; decoded_account_text and segment JSON remain authoritative