Swainson's Thrush

catharus ustulatus

Turdidae · Thrushes

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

The account

Description

18 cm. Olivaceous brown above; the diagnostic mark of this species is the whitish-buff eyering and lores; below white, washed buff on throat and chest with black spots; sides of belly with olive brown wash.

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

Where it was recorded

The discs' own checklists select Swainson's Thrush at 1 locality.

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.

Serra da Cantareira SRSB

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 a 'whit...whit...' song a sequence of upward pearling fluted notes (see vocalization #1).

Behavior

Primarily frugivorous in the winter quarters, rarely descending to the ground (¹³³).

Breeding

North America.

Habitat and status

Occurs in lower and middle strata of forest, forest borders and parkland.

Distribution

Recorded once in Rio de Janeiro (¹³³) and at Boraceia (¹¹⁹). To be expected as a winter straggler. Below 2000 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

calls, song, June 1997, Jaffrey, NH.

Recording files on the disc

343.mp3 calls, song, June 1997, Jaffrey, NH.

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: 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	catharus ustulatus	Swainson's Thrush	Turdidae
CLEMENTS	catharus ustulatus	Swainson's Thrush	Turdidae
AOU_HM	catharus ustulatus	Swainson's Thrush	Turdidae

Source details

Identifier on this site: seb_species_0325
Account identifier: seb_account_0325
Account number on the disc: 325
Source edition: CD03 / 2006 package
Original taxonomy scheme: WORLD
Structure status: heuristic; decoded_account_text and segment JSON remain authoritative