White-thighed Swallow

neochelidon tibialis

Hirundinidae,Hirundininae · Martins, Swallows

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

The account

Description

11.5 cm. A small, very dark swallow of humid forest. Above brownish gray with a greenish gloss. Rump grayish brown. Below ashy brownish-grey, crissum black.

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

Where it was recorded

The discs' own checklists select White-thighed Swallow 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. 1 has no usable coordinate and is listed below unplotted.

Boraceia BOSB
Jureia-Peruibe JUSB position not recoverable
Parati PARB
PE Carlos Botelho PCSB
Reserva Ecológica Guapiacú RERB
Serra dos Orgãos SRRB

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 is a 'zeet-zeet'.

Behavior

Flies in pairs or small groups over open areas and water adjacent to dense forest and at forest edge. They feed also above the forest canopy. They perch on bare branches of trees.

Breeding

Breeding season in Southeast Brazil not known. Breeds in woodpecker holes and in banks of rivers.

Habitat and status

A bird associated with humid rain forest. Up to 500 meters in primary and old secondary forest. (¹⁴⁰).

Distribution

In Estado São Paulo at PE Carlos Botelho, near Ubatuba (¹¹⁹) and at the Fazenda Picinguaba between Ubatuba and Parati (Remold H., Mueller F. and Willis E.O., unpubl.). First collected near Bertioga in 1961 (⁷⁶), it was later recorded from the coast of Estado São Paulo (¹⁶). In Estado Rio de Janeiro, listed for Cantagalo (⁴⁰). To 1000 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. Rio Doçe, 11/3/00. Clear, 25°C. Forest edge.
calls, recorded by TA Parker, Jr. LNS 25656.
Calls, recorded by TA Parker, Jr. LNS 52410.

Recording files on the disc

9884.mp3 Calls. Rio Doçe, 11/3/00. Clear, 25°C. Forest edge.
436.mp3 calls, recorded by TA Parker, Jr. LNS 25656.
9289.mp3 Calls, recorded by TA Parker, Jr. LNS 52410.

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.

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	neochelidon tibialis	White-thighed Swallow	Hirundinidae,Hirundininae
CLEMENTS	neochelidon tibialis	White-thighed Swallow	Hirundinidae,Hirundininae
AOU_HM	neochelidon tibialis	White-thighed Swallow	Hirundinidae,Hirundininae

Open questions about this bird

Recovered evidence that has not been settled. It is published because leaving it out would misrepresent what the discs contain.

Later listening, kept separate from the disc's own claims

content_9884 — historical_target: PYGOCHELIDON CYANOLEUCA (historical_source)

content_9884 — review_identification: White-thighed Swallow (human_review; definite)

Listening observation HRO_0005

What was heard: White-thighed Swallow is audible.

Relationship to the disc's evidence: agrees

Identification certainty: definite · transcription certainty: not_applicable · owner_family_clarification

How later review relates to this bird's record

Added after review XW_0004 — ordinary_species_account_link

Historical label: White-thighed Swallow / neochelidon tibialis

agrees · retain historical link

Later listening confirms; does not create the link.

Source details

Identifier on this site: seb_species_0306
Account identifier: seb_account_0306
Account number on the disc: 306
Source edition: CD03 / 2006 package
Original taxonomy scheme: WORLD
Structure status: heuristic; decoded_account_text and segment JSON remain authoritative