Yellow-legged Thrush

turdus flavipes

Turdidae · Thrushes

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

The account

Description

22 cm. In both sexes the legs are bright yellow. Male has a yellow bill, in the female the bill is grayish with a yellow base. Yellow eye ring. The male is black with a gray back and a gray belly. The female is dark brown above, more buffy below, belly palest. Fine dark streaks on throat. Crissum buff-brown.

Juvenile females have dark brown upperparts with brown wings and tail; chin whitish becoming buff- yellow on throat and yellowish on breast, spotted finely with brown on chin and throat; brown bars and tips on breast and flanks.

Juvenile males have slate-brown upperparts with black wings and tail and pale orange spotting to crown, mantle, back and scapulars.

The first-winter bird has yellowish- orange tips to median and greater coverts and first-summer birds still retain thin white tips to greater coverts, forming a thin wingbar (¹⁴³).

Juvenile male Disc 3 · 2006
First year immature Disc 3 · 2006

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

Where it was recorded

The discs' own checklists select Yellow-legged Thrush at 20 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
Ilha do Cardoso ILSB
Ilha São Sebastião SSSB
Jureia-Peruibe JUSB position not recoverable
Marica MRRB
Nucleo Sta. Virginia NUSP
Parati PARB
Pariquera-Abaixo PESB
PE Carlos Botelho PCSB
PE Jacupiranga PJSB
Reserva Ecológica Guapiacú RERB
Rio de Janeiro RIRB
Serra Bocaina SESB
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 (vocalizations # 1, 2 and 6) with thrush-like general character, but contains squeaky phrases which are frequently repeated several times. The particular strophes used are specific for each singer. Sometimes mimics other songs. Has a variety of calls: a 'wrrr' (#3), a short 'writ' (#4), a soft 'wek' (#5). Willis and Oniki (¹¹⁹) note a raucous 'iuj'.

Behavior

Mostly arboreal, frequents fruit trees. Sings from a high perch in the forest, usually concealed.

Breeding

Breeds in Southeast Brazil from November to January..

Habitat and status

Common in primary and secondary forest border areas at the coast and the coastal mountains, also in coffee and banana plantations close to forest, from sea level to about 1800 meters

Distribution

Throughout, occuring further inland as a winter visitor.

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

Parco Estadual PE Jacupiranga, 10/23/94, cloudy, 26°C, opening in primary rainforest. With Chiroxiphia caudata, Trogon viridis, Oxyruncus cristatus, Vireo olivaceus, Procnias nudicollis
Song, Serra dos Orgãos, November 12, 2002. Ca 1800 meters, open forest.
Call. Fazenda Intervales, 11/30/97. Sunny, 27°C. Secondary forest.
Call. Fazenda Intervales 10/25/00. Cloudy, 20°C. Primary forest. With Trogon viridis, Ramphocaenus melanurus, Procnias nudicollis
Calls, Serra dos Orgãos, Teresopolis, RJ, October 31, 2000, sunny, 20°C, forest.
Song, November 14, 1993, Boraceia, sunny 30°C, forest.

Recording files on the disc

15027.mp3 Parco Estadual PE Jacupiranga, 10/23/94, cloudy, 26°C, opening in primary rainforest. With Chiroxiphia caudata, Trogon viridis, Oxyruncus cristatus, Vireo olivaceus, Procnias nudicollis
1670.mp3 Song, Serra dos Orgãos, November 12, 2002. Ca 1800 meters, open forest.
2771.mp3 Call. Fazenda Intervales, 11/30/97. Sunny, 27°C. Secondary forest.
11914.mp3 Call. Fazenda Intervales 10/25/00. Cloudy, 20°C. Primary forest. With Trogon viridis, Ramphocaenus melanurus, Procnias nudicollis
8839.mp3 Calls, Serra dos Orgãos, Teresopolis, RJ, October 31, 2000, sunny, 20°C, forest.
10561.mp3 Song, November 14, 1993, Boraceia, sunny 30°C, forest.

More images

The disc records this picture against the bird without a caption. 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.

Names by release

Yellow-legged Thrush platycichla flavipes Disc 2 · 2001
Yellow-legged Thrush turdus flavipes Disc 3 · 2006, Disc 1 · 2011

The account in the Disc 1 · 2011 revision

The 2011 Disc 1 revision edited this account; the sections listed below differ from the Disc 3 release text.

Sections with genuine 2011 edits (vs the Disc 3 release): description.

Description Disc 1 · 2011

Juvenile females have dark brown upperparts with brown wings and tail; chin whitish becoming buff- yellow on throat and yellowish on breast, São Paulootted finely with brown on chin and throat; brown bars and tips on breast and flanks.