Diademed Tanager

stephanophorus diadematus

Thraupidae · Tanagers, Honeycreepers

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

The account

Description

19 cm. Shining dark blue overall with a thick black bill. Forecrown, lores and chin black. Center of crown white with red patch. Wings and tail black, the feathers edged blue.

Immatures are dull grayish blue with the crown pattern barely visible.

Adult Disc 3 · 2006
Juvenile Disc 3 · 2006

Each plate is labelled with the disc's own caption.

Where it was recorded

The discs' own checklists select Diademed Tanager 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.

Campos do Jordão CASB
Fazenda Intervales FASB
Jureia-Peruibe JUSB position not recoverable
Nucleo Sta. Virginia NUSP
Parati PARB
PE Jacupiranga PJSB
Reserva Ecológica Guapiacú RERB
Serra Bocaina SESB
Serra da Cantareira SRSB
Serra dos Orgãos SRRB
Serra dos Tucanos SDTC
Serras de Japi e Ermida SDSB
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

Call 'chewp' (vocalization #6). A dawnsong is described as a short warble, 2-3 sec long, consisting of about 4 phrases with the second and third notes lower pitched than than the first and fourth note (¹⁵⁹). Song a fluid grosbeak like warble (vocalization # 1-5).

Behavior

Forages in fruiting trees, often sitting on top of tall trees, also in fruit bearing bushes. Found alone, in pairs or small groups, rarely in mixed species flocks.

Breeding

October, Rio Grande do Sul (¹⁵⁹).

Habitat and status

Locally common in open forest and scrub, in our region only in montane areas of the serras.

Distribution

Between 800 and 2400 meters. In Estado São Paulo found at Nucleo Sta. Virginia, Itatiaia, Serra Bocaina, Fazenda Intervales, PE Jacupiranga, Campos do Jordão. In Estado Rio de Janeiro found in the Serra dos Orgãos.

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. Fazenda Intervales, 11/28/97. Sunny, 27°C. Open country with trees and bushes.
Song. Fazenda Intervales, 11/30/97. Sunny, 27°C. Open forest.
Song. Serra da Mantiqueira, 11/18/98. Sunny, 20°C. Open forest, high altitude.
Song. 10/17/99, Nucleo Sta. Virginia. Misty, 15°C. Degraded forest. With Turdus rufiventris.
Song. Ibitiboca, 10/31/00. Cloudy, 20°C. Open caatinga.
Calls, Juan Mazar Barnett

Recording files on the disc

13233.mp3 Song. Fazenda Intervales, 11/28/97. Sunny, 27°C. Open country with trees and bushes.
16325.mp3 Song. Fazenda Intervales, 11/30/97. Sunny, 27°C. Open forest.
10903.mp3 Song. Serra da Mantiqueira, 11/18/98. Sunny, 20°C. Open forest, high altitude.
2800.mp3 Song. 10/17/99, Nucleo Sta. Virginia. Misty, 15°C. Degraded forest. With Turdus rufiventris.
3380.mp3 Song. Ibitiboca, 10/31/00. Cloudy, 20°C. Open caatinga.
711.mp3 Calls, Juan Mazar Barnett

More images

Fritz Mueller, N.Y. Disc 3 · 2006

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	stephanophorus diadematus	Diademed Tanager	Thraupidae
CLEMENTS	stephanophorus diadematus	Diademed Tanager	Thraupidae
AOU_HM	stephanophorus diadematus	Diademed Tanager	Thraupidae

Source details

Identifier on this site: seb_species_0395
Account identifier: seb_account_0395
Account number on the disc: 395
Source edition: CD03 / 2006 package
Original taxonomy scheme: WORLD
Structure status: heuristic; decoded_account_text and segment JSON remain authoritative