Star-throated Antwren

myrmotherula gularis

Thamnophilidae · Antbirds, Antwrens

Disc 2 · 2001 listed
Disc 3 · 2006 listed
Disc 1 · 2011 listed

The account

Description

9 cm. Male above dark rust-brown. Forehead grizzled with slaty gray. Wings black, the borders of the primaries, secondaries and tertials rusty, and the coverts with 2 buff wing bars. Throat black, the feathers with white tips giving the throat a stippled appearance. Below slaty gray, the sides of belly and crissum rufous-brown.

The white spots on the throat are larger in the females.

The disc records this picture against the bird without a caption. Disc 3 · 2006

Where it was recorded

The discs' own checklists select Star-throated Antwren at 14 localities.

Historical checklist localities on the disc's own area map — the red dots the original program drew, placed by its recovered projection. Not a range map: it shows the places whose checklists record the bird, nothing more. 1 has no usable coordinate and is listed below unplotted.

Boraceia BOSB
Fazenda Intervales FASB
Ilha São Sebastião SSSB
Jureia-Peruibe JUSB position not recoverable
Nucleo Sta. Virginia NUSP
Parati PARB
PE Carlos Botelho PCSB
PE Jacupiranga PJSB
Rio de Janeiro RIRB
Serra da Cantareira SRSB
Serra dos Orgãos SRRB
Serra dos Tucanos SDTC
Sete Barras STSB
Ubatuba UBSB

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.

Voice

Song is a repeated descending 'zriu zriu zriu zriu...', 5-12 times. Call a harsh chatter (⁴⁴).

Behavior

Forages on or close to the ground in pairs or groups.

Habitat and status

Rather common inside humid primary or secondary forest. Frequently in dark narrow ravines close to waterfalls and brooks.

Distribution

Throughout. Common near Ubatuba, PE Jacupiranga, Fazenda Intervales. Sea level (Corisco trail near Picinguaba) to about 1200 meters.

Taxonomy notes

An antwren of humid forest endemic to southeastern Brazil.

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.

Vocalizations

Song / call. Serra da Mantiqueira, Tres Picos trail, Itatiaia NP, 11/5/93. Sunny, 25°C. Primary forest. With Cranioleuca pallida.
Song / calls. Fazenda Intervales, 11/7/95. Sunny, 25°C. Secondary forest. With Hylophilus poicilotis.
Song / calls. Fazenda Intervales, 11/30/97. Sunny, 27°C. Primary forest.
Song / calls. Fazenda Intervales, 11/30/97. Sunny, 27°C. Primary forest. With Procnias nudicollis.
Song / calls. Fazenda Intervales, 10/30/00. Clear, 20°C. Primary forest.

Recording files on the disc

15139.mp3 Song / call. Serra da Mantiqueira, Tres Picos trail, Itatiaia NP, 11/5/93. Sunny, 25°C. Primary forest. With Cranioleuca pallida.
13536.mp3 Song / calls. Fazenda Intervales, 11/7/95. Sunny, 25°C. Secondary forest. With Hylophilus poicilotis.
336.wav Song / calls. Fazenda Intervales, 11/30/97. Sunny, 27°C. Primary forest.
1321.mp3 Song / calls. Fazenda Intervales, 11/30/97. Sunny, 27°C. Primary forest. With Procnias nudicollis.
7841.wav Song / calls. Fazenda Intervales, 10/30/00. Clear, 20°C. Primary forest.

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	myrmotherula gularis	Star-throated Antwren	Thamnophilidae
CLEMENTS	myrmotherula gularis	Star-throated Antwren	Thamnophilidae
AOU_HM	myrmotherula gularis	Star-throated Antwren	Thamnophilidae

Source details

Identifier on this site: seb_species_0124
Account identifier: seb_account_0124
Account number on the disc: 124
Source edition: CD03 / 2006 package
Original taxonomy scheme: WORLD
Structure status: heuristic; decoded_account_text and segment JSON remain authoritative