Ochre-rumped Antbird

drymophila ochropyga

Thamnophilidae · Antbirds, Antwrens

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

The account

Description

12 cm. The male is similar to Drymophila genei, with a black cap and eye-stripe and a white superciliary stripe, but the back is olive-gray. Wings black with no rufous in the flight feathers. Below white, boldly streaked black. Flanks, belly and crissum rufous. Tail black with white tips.

Female's back is brown. Below beige with much stronger black streaks than the female Drymophila genei. Crissum and flanks rusty-brown.

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 Ochre-rumped Antbird at 16 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.

Barreiro Rico BRSB
Boraceia BOSB
Fazenda Intervales FASB
Fazenda Paraiso PASB
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 Bocaina SESB
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 rough tripartite 'zji jeeeee-i' or, 'zji zje zje zje' less squeaky than the song of Drymophila genei; sometimes followed by a descending 'jew jew jew jew'. Call a rasping 'zerrrr', a fast 'zwi-zizizizizizizizi' (track # 4) or a fast 'twitwitwitiwiwiwiwiwi'.

Behavior

Low in scrub and often difficult to see. Frequently in pairs.

Habitat and status

A montane Drymophila antbird endemic to southeast Brazil. Quite common in middle altitude forest and borders. Also in degraded scrubby areas at higher altitudes.

Distribution

Throughout, from PE Jacupiranga to Rio de Janeiro. Altitudinal range is lower than Drymophila genei 600-1300 meters (Ridgely and Tudor).

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. Serra Bocaina, near S. Jose do Barreiro, 11/3/93. Cloudy, 21°C. Secondary scrub. With Trogon surucua, Cyclarhis gujanensis, Synallaxis spixi, Basileuterus culicivorus, Pachyramphus polychopterus.
Song. Serra Bocaina, near S. Jose do Barreiro,11/2/93. Sunny, 25°C. Secondary scrub. With Cyclarhis gujanensis, Turdus rufiventris, Saltator similis, Todirostrum plumbeiceps.
Call. Fazenda Intervales, 11/30/97. Sunny, 27°C. Primary forest. With Attila rufus.
Calls. Fazenda Intervales, 11/30/97. Sunny, 27°C. Primary forest. With Ramphocaenus melanurus, Brotogeris tirica, Procnias nudicollis.
Calls. Fazenda Intervales, 11/30/97. Sunny, 27°C. Secondary forest. With Dysithamnus stictothorax, Cacicus haemorrhous, Vireo olivaceus.
Call. Serra da Mantiqueira, Agulhas Negras road, 10/23/99. Clear, cool, 20°C. Montane scrub. With Synallaxis ruficapilla.

Recording files on the disc

9829.mp3 Song. Serra Bocaina, near S. Jose do Barreiro, 11/3/93. Cloudy, 21°C. Secondary scrub. With Trogon surucua, Cyclarhis gujanensis, Synallaxis spixi, Basileuterus culicivorus, Pachyramphus polychopterus.
966.mp3 Song. Serra Bocaina, near S. Jose do Barreiro,11/2/93. Sunny, 25°C. Secondary scrub. With Cyclarhis gujanensis, Turdus rufiventris, Saltator similis, Todirostrum plumbeiceps.
15322.mp3 Call. Fazenda Intervales, 11/30/97. Sunny, 27°C. Primary forest. With Attila rufus.
10071.mp3 Calls. Fazenda Intervales, 11/30/97. Sunny, 27°C. Primary forest. With Ramphocaenus melanurus, Brotogeris tirica, Procnias nudicollis.
12904.mp3 Calls. Fazenda Intervales, 11/30/97. Sunny, 27°C. Secondary forest. With Dysithamnus stictothorax, Cacicus haemorrhous, Vireo olivaceus.
2442.wav Call. Serra da Mantiqueira, Agulhas Negras road, 10/23/99. Clear, cool, 20°C. Montane scrub. With Synallaxis ruficapilla.

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	drymophila ochropyga	Ochre-rumped Antbird	Thamnophilidae
CLEMENTS	drymophila ochropyga	Ochre-rumped Antbird	Thamnophilidae
AOU_HM	drymophila ochropyga	Ochre-rumped Antbird	Thamnophilidae

Source details

Identifier on this site: seb_species_0141
Account identifier: seb_account_0141
Account number on the disc: 141
Source edition: CD03 / 2006 package
Original taxonomy scheme: WORLD
Structure status: heuristic; decoded_account_text and segment JSON remain authoritative