Olive Spinetail

cranioleuca obsoleta

Furnariidae,Synallaxinae · Spinetails, Castaneros

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

The account

Description

5.1" Pale brownish-olive above. Crown grayish olive-brown. postocular streak buffy. A white chin otherwise dull yellowish-ocher below, darker on the lower flanks. Wing coverts and tail rufous-brown, the tail feathers sharply pointed.

Juvenile plumage is darker and purer olive-green, the breast with dark vermiculations.

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

Where it was recorded

The discs' own checklists select Olive Spinetail 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.

Fazenda Intervales FASB

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

A sequence of hard 'chep... chep... chep... chip... chip.......' sounds, plus a typical rapid 5-6 syllable chatter, 'chichichichichit', lasting less than 1 second. Song is a fast sequence of 10-12 'zizizizizizizizizirrrr' sounds that drop in pitch at the end of each sequence, reminiscent of Cranioleuca pallida, but longer. The 'zizizi...' sequences can be still longer and can be delivered as a pair song.

Behavior

Actively climbs about in epiphytes and mossy branches: not very shy and not a skulker. Frequently in pairs.

Habitat and status

Uncommon in undergrowth and borders of humid woodland. Also at higher elevation in Araucaria dominated woodland.

Distribution

Southern Est. São Paulo close to the border with Parana (⁴⁴). Recorded from Itararé(1903, ⁴⁰).

Taxonomy notes

Cranioleuca has a shorter tail than Synallaxis.

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. Cornell Cat#19091, São Francisco da Paula, Fazenda Zamoreira, Rio Grande do Sul, 09/24/72. Clear. Recording by William Belton.
Calls. Cornell Cat#19920. Bage, Rio Grande do Sul, 01/16/77, overcast. With Vireo olivaceus, Platycichla flavipes, Turdus rufiventris. Recording by William Belton.
Calls. Cornell Cat#23719. Iguazu National Park, Misiones, Argentina, 11/04/80. Clear. With Trogon viridis. Recording by T. A. Parker, Jr..
Song. Cornell Cat#57872. Iguazu National Park, Misiones, Argentina, 08/14/90. With Tolmomyias sulphurescens, Colonia colonus, Piprites chloris. Recording by D. W. Finch.

Recording files on the disc

13959.wav Call. Cornell Cat#19091, São Francisco da Paula, Fazenda Zamoreira, Rio Grande do Sul, 09/24/72. Clear. Recording by William Belton.
15431.mp3 Calls. Cornell Cat#19920. Bage, Rio Grande do Sul, 01/16/77, overcast. With Vireo olivaceus, Platycichla flavipes, Turdus rufiventris. Recording by William Belton.
10400.wav Calls. Cornell Cat#23719. Iguazu National Park, Misiones, Argentina, 11/04/80. Clear. With Trogon viridis. Recording by T. A. Parker, Jr..
11272.mp3 Song. Cornell Cat#57872. Iguazu National Park, Misiones, Argentina, 08/14/90. With Tolmomyias sulphurescens, Colonia colonus, Piprites chloris. Recording by D. W. Finch.

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	cranioleuca obsoleta	Olive Spinetail	Furnariidae,Synallaxinae
CLEMENTS	cranioleuca obsoleta	Olive Spinetail	Furnariidae,Synallaxinae
AOU_HM	cranioleuca obsoleta	Olive Spinetail	Furnariidae,Synallaxinae

Source details

Identifier on this site: seb_species_0072
Account identifier: seb_account_0072
Account number on the disc: 72
Source edition: CD03 / 2006 package
Original taxonomy scheme: WORLD
Structure status: heuristic; decoded_account_text and segment JSON remain authoritative