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Grey-and-white tyrannulet

species of bird

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJun 2, 2026
Entity authorityQ839642 ↗
Source-derived summary

The grey-and-white tyrannulet (Pseudelaenia leucospodia) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Ecuador and Peru.

Taxonomy and systematics

The grey-and-white tyrannulet was originally described as Elainea leucospodia. Later authors placed it in genera Phaeomyias or Myiopagis, and its original genus was later spelled "Elaenia". A 1986 publication proposed the monotypic genus Pseudelaenia for it. A genetic study published in 2009 confirmed that it belonged there and was not closely related to any of its former genera.

The grey-and-white tyrannulet is monotypic. Some authors suggest that the population in southwestern Ecuador should be treated as subspecies P. l. cinereifrons but it probably cannot be distinguished from the Peruvian population.

Description

The grey-and-white tyrannulet is about 12.5 cm (4.9 in) long and weighs 10 to 11 g (0.35 to 0.39 oz).

Editorial summary

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

Editorial reviewUseful for establishing the present vocabulary of the subject while preserving a route back to the evidence on which that vocabulary rests. The current lead gives the account dated anchors—1986, 2009—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, Grey-and-white, tyrannulet 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

Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Jun 2, 2026. The linked authority identifier is Q839642. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1986 and 2009.

Critical limits

Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. 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.

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  2. Expand the search: follow Grey-and-white tyrannulet primary sources, Grey-and-white tyrannulet archive and Grey-and-white research across catalogues and specialist indexes.
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Source & attribution

This entry incorporates text from “Grey-and-white tyrannulet” 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.