Yellow-chinned Spinetail

certhiaxis cinnamomea

Furnariidae,Synallaxinae · Spinetails, Castaneros

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

The account

Description

5.5" Uniformly reddish-brown above with a faint grayish superciliary stripe. Wing coverts reddish chestnut. Paler rufous on tail. A sulphur-yellow patch on the upper throat otherwise white below, tinged buffy cinnamon at the crissum.

Immatures lack the yellow throat patch and are less rufous.

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

Where it was recorded

The discs' own checklists select Yellow-chinned Spinetail at 12 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 recorded locality lies beyond the map's edge and is listed below instead.

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 'tik tik tirrrrrrrrrrr', the last syllable a dry trill of varying length, also presented as a duet. Call: 'tjep tjep'.

Behavior

Climbs around in reed warbler fashion within reed beds or high grassy vegetation. Not very secretive and relatively easy to observe.

Breeding

Makes a retort-shaped nest with side entrance in bushes (³⁰).

Habitat and status

Common and conspicuous. Border of lagunas, swamps and brooks in reedbeds, bushy areas and areas with grass and bushes.

Distribution

Throughout. To about 500 meters.

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, duet. Pirapora, 11/13/98. Sunny, 27°C. Reeds near laguna. With Vanellus chilensis, Furnarius rufus.
Calls. Picinguaba, east of Ubatuba, 11/21/98. Cloudy, light rain, 20°C. Swamp within forest.
Call. Cornell Cat#20055. Lagoinhas, Tijucas, Parana, 12/29/78. Clear with ground fog. With Elaenia mesoleuca, Attila phoenicurus. Recording by William Belton.
Song. Fazenda Intervales, 10/25/00. Sunny, 25°C. Open reed bed.

Recording files on the disc

3367.mp3 Song, duet. Pirapora, 11/13/98. Sunny, 27°C. Reeds near laguna. With Vanellus chilensis, Furnarius rufus.
12110.wav Calls. Picinguaba, east of Ubatuba, 11/21/98. Cloudy, light rain, 20°C. Swamp within forest.
7792.wav Call. Cornell Cat#20055. Lagoinhas, Tijucas, Parana, 12/29/78. Clear with ground fog. With Elaenia mesoleuca, Attila phoenicurus. Recording by William Belton.
10140.wav Song. Fazenda Intervales, 10/25/00. Sunny, 25°C. Open reed bed.

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	certhiaxis cinnamomea	Yellow-chinned Spinetail	Furnariidae,Synallaxinae
CLEMENTS	certhiaxis cinnamomea	Yellow-chinned Spinetail	Furnariidae,Synallaxinae
AOU_HM	certhiaxis cinnamomea	Yellow-chinned Spinetail	Furnariidae,Synallaxinae

Source details

Identifier on this site: seb_species_0073
Account identifier: seb_account_0073
Account number on the disc: 73
Source edition: CD03 / 2006 package
Original taxonomy scheme: WORLD
Structure status: heuristic; decoded_account_text and segment JSON remain authoritative