Brown-breasted Bamboo-Tyrant

hemitriccus obsoletus

Tyrannidae,Elaeninae · Tyrannulets

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

The account

Description

11 cm. A tyrant of the highlands, not confined to bamboo thickets. Buff ochre above with an olive touch. A bright buff eye-spot in front of the eye. Wings and tail darker without bars.

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

Where it was recorded

The discs' own checklists select Brown-breasted Bamboo-Tyrant at 6 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.

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

A staccato sequence of hard, dry 'tik...tik...tik....' notes of varying speed, sometimes drawn together into a dry trill (cut #4).

Behavior

Forages in dense undergrowth of montane forest by performing upward strikes and perch gleaning. Hard to observe.

Breeding

The nest is a big pocket attached to the leaves of orchids with a side entrance (⁷⁷).

Habitat and status

Common above 700 meters in humid primary and secondary montane forest, scrub and forest borders.

Distribution

Throughout. Serra dos Orgãos, Serra do Mar, Serra Mantiqueira, Fazenda Intervales. Up to 2200 meters.

Taxonomy notes

Endemic to 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

Calls, above Ubatuba, Nucleo Sta. Virginia, 10/30/93. Cloudy, 26°C. Scrub, border of rainforest. With Hylopezus nattereri, Conopophaga lineata, Saltator similis.
Calls, above Ubatuba, Nucleo Sta. Virginia, 10/31/93. Clear, 25°C, scrub
Call. Serra Bocaina, near S. Jose do Barreiro, 11/3/93. Cloudy, 22°C. Secondary forest, scrub
Call. Serra Bocaina, near S. Jose do Barreiro, 11/4/93. Sunny, 25°C. Secondary scrub
Calls. 10/17/99, Nucleo Sta. Virginia. Misty, 15°C. Scrub with trees.
Calls. Fazenda Intervales, Barra Grande road. 10/25/00. Cloudy, 20°C. Bamboo forest.

Recording files on the disc

12818.wav Calls, above Ubatuba, Nucleo Sta. Virginia, 10/30/93. Cloudy, 26°C. Scrub, border of rainforest. With Hylopezus nattereri, Conopophaga lineata, Saltator similis.
14508.wav Calls, above Ubatuba, Nucleo Sta. Virginia, 10/31/93. Clear, 25°C, scrub
2265.mp3 Call. Serra Bocaina, near S. Jose do Barreiro, 11/3/93. Cloudy, 22°C. Secondary forest, scrub
7994.mp3 Call. Serra Bocaina, near S. Jose do Barreiro, 11/4/93. Sunny, 25°C. Secondary scrub
10946.wav Calls. 10/17/99, Nucleo Sta. Virginia. Misty, 15°C. Scrub with trees.
1587.wav Calls. Fazenda Intervales, Barra Grande road. 10/25/00. Cloudy, 20°C. Bamboo 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.

Names by release

Brown-breasted Pygmy-Tyrant hemitriccus obsoletus Disc 2 · 2001
Brown-breasted Bamboo-Tyrant hemitriccus obsoletus Disc 3 · 2006, Disc 1 · 2011

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	hemitriccus obsoletus	Brown-breasted Bamboo-Tyrant	Tyrannidae,Elaeninae
CLEMENTS	hemitriccus obsoletus	Brown-breasted Pygmy-Tyrant	Tyrannidae,Elaeninae
AOU_HM	hemitriccus obsoletus	Brown-breasted Pygmy-Tyrant	Tyrannidae,Elaeninae

Source details

Identifier on this site: seb_species_0226
Account identifier: seb_account_0226
Account number on the disc: 226
Source edition: CD03 / 2006 package
Original taxonomy scheme: WORLD
Structure status: heuristic; decoded_account_text and segment JSON remain authoritative