Small-billed Elaenia

elaenia parvirostris

Tyrannidae,Elaeninae · Tyrannulets

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

The account

Description

15 cm. Very similar to Elaenia albiceps, probably not distinguishable in the field and they may even be the same species. Throat and chest grayish. The third wing bar on the lesser wing coverts may only be present in fresh plumage (Ridgely).

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

Where it was recorded

The discs' own checklists select Small-billed Elaenia at 4 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.

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, 'chi-brr', is similar to the call of albiceps (Ridgely, listen to cut #2 of albiceps). Also a more two-syllabled 'zi-jeu' (cut #2). Song (dawn?) is a burry four-syllable 'wi-di-du-we' (cut #1). Also gives short 'jip' calls and a descending 'wirrrr' (³⁸).

Behavior

Presumably engages in perch and upward-hover gleaning like the other Elaenias (⁷⁴).

Habitat and status

Occurs in forest borders, gardens and shrub, and according to Ridgely (⁴⁴) also in humid forest during migration. Uncommon.

Distribution

Throughout. A rare breeder in Southern Estado São Paulo (near Itararé, 1983, ⁷⁶) and Pinto mentions the species from Curitiba, Estado Parana, ca 100 km south of the border of Estado São Paulo. Also a regular migrant that moves north to the Amazon. Up to 1000 meters (⁴⁴).

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

Day song? Cornell Cat#19552. Fazenda São Jose, Encruzilhada do Sul, Rio Grande do Sul, 2/5/72. Recording by W. Belton.
Calls. Cornell Cat#19551. Gramado, Rio Grande do Sul, 12/15/76. Recording by J. Vielliard .

Recording files on the disc

5059.wav Day song? Cornell Cat#19552. Fazenda São Jose, Encruzilhada do Sul, Rio Grande do Sul, 2/5/72. Recording by W. Belton.
11722.wav Calls. Cornell Cat#19551. Gramado, Rio Grande do Sul, 12/15/76. Recording by J. Vielliard .

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	elaenia parvirostris	Small-billed Elaenia	Tyrannidae,Elaeninae
CLEMENTS	elaenia parvirostris	Small-billed Elaenia	Tyrannidae,Elaeninae
AOU_HM	elaenia parvirostris	Small-billed Elaenia	Tyrannidae,Elaeninae

Source details

Identifier on this site: seb_species_0195
Account identifier: seb_account_0195
Account number on the disc: 195
Source edition: CD03 / 2006 package
Original taxonomy scheme: WORLD
Structure status: heuristic; decoded_account_text and segment JSON remain authoritative