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Rusty-bellied brushfinch

species of bird

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionMay 27, 2026
Entity authorityQ2226500 ↗
Source-derived summary

The rusty-bellied brushfinch (Atlapetes nationi) is a species of bird in the family Passerellidae, the New World sparrows. It is endemic to Peru.

Taxonomy and systematics

The rusty-bellied brushfinch was formally described in 1881 with the binomial Buarremon nationi. Its specific epithet honors William Nation, who provided the type specimen. Genus Buarremon was merged into Atlapetes early in the twentieth century. Various authors have treated the rusty-bellied brushfinch as conspecific with one of the slaty brushfinch (A. schistaceus) or the bay-crowned brushfinch (A. seebohmi).

The rusty-bellied brushfinch has two subspecies, the nominate A. n. nationi (Sclater, PL, 1881) and A. n. brunneiceps (Berlepsch and Stolzmann, 1906).

Description

The rusty-bellied brushfinch is 17 to 19 cm (6.7 to 7.5 in) long and weighs about 40 to 43 g (1.4 to 1.5 oz).

Editorial summary

Begin with the source’s own compact description: “Rusty-bellied brushfinch” is species of bird. The dossier treats that line as a proposition to test through Rusty-bellied, brushfinch and species, not as a finished interpretation.

Editorial reviewA practical orientation to terminology and classification, particularly when read beside dated observations, specimens or technical literature. The current lead gives the account dated anchors—1881, 1906—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, Rusty-bellied, brushfinch and species is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “species of bird” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated May 27, 2026. The linked authority identifier is Q2226500. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1881 and 1906.

Critical limits

Scientific names, classifications and consensus can change while older terminology persists in catalogues and historical literature. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.

Best used for
  • Current terminology
  • Classification context
  • Finding cited technical literature
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Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.

Three-step research path

  1. Establish the record: confirm the title “Rusty-bellied brushfinch”, its source revision and the description used here.
  2. Expand the search: follow Rusty-bellied brushfinch primary sources, Rusty-bellied brushfinch archive and Rusty-bellied research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Rusty-bellied brushfinch”?
  2. Is the terminology current, historical or disputed?
  3. Which observation, specimen, dataset or publication supports the account?
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Source & attribution

This entry incorporates text from “Rusty-bellied brushfinch” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.