Brown-crested Flycatcher

myiarchus tyrannulus

Tyrannidae,Tyranninae · Tyrannine Flycatchers

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

The account

Description

18 cm. Bill black with almost no flesh color on the base of the lower mandible. Otherwise similar to Myiarchus swainsoni, but with the primaries clearly edged rufous-brown and the inner webs of tail feathers rufous (visible from below). Throat and chest pale gray. Belly pale yellow.

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

Where it was recorded

The discs' own checklists select Brown-crested Flycatcher at 10 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

Typical call is a repeated 'pip....pip.....pip......' quite unlike the calls of the other Myiarchus.

Behavior

Perches rather low in the open in tall trees and high scrub and is mainly involved in hover gleaning, especially in upward-hover gleaning and less so in sally gleaning.

Habitat and status

A common Myiarchus of more arid regions. Regular in dryer regions of the interior, gallery forests, cerradão, cerrado, scrub and lighter, more open woodland.

Distribution

Scarce in the Serra do Mar (¹⁵). In estado São Paulo mostly inland, e.g. near Rio Claro (⁴⁰). Might occur closer to the shore in suitable habitat. Below 1800 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

Call. Pirapora, 11/13/98. Sunny, 30°C. Gallery forest. With Columba picazuro.

Recording files on the disc

1063.mp3 Call. Pirapora, 11/13/98. Sunny, 30°C. Gallery forest. With Columba picazuro.

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	myiarchus tyrannulus	Brown-crested Flycatcher	Tyrannidae,Tyranninae
CLEMENTS	myiarchus tyrannulus	Brown-crested Flycatcher	Tyrannidae,Tyranninae
AOU_HM	myiarchus tyrannulus	Brown-crested Flycatcher	Tyrannidae,Tyranninae

Source details

Identifier on this site: seb_species_0276
Account identifier: seb_account_0276
Account number on the disc: 276
Source edition: CD03 / 2006 package
Original taxonomy scheme: WORLD
Structure status: heuristic; decoded_account_text and segment JSON remain authoritative