Evidence map›Paper›PMID 42883450›Full record

ArticleBiology2026

First Documented Case of Complete Leucism in the Long-Eared Owl (

Rusko Petrov, Simona Krasteva

Abstract readCase Reports
PubMed Full text at PMC Publisher
In one paragraph

Article in Biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors.

Rusko PetrovDepartment of General Animal Husbandry, Faculty of Veterinary Medicine, Trakia University, 6000 Stara Zagora, Bulgaria.
Simona KrastevaFaculty of Veterinary Medicine, Trakia University, Student Campus, 6000 Stara Zagora, Bulgaria.ORCID 0009-0004-4203-533X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Leucism is a hereditary anomaly affecting the coloration of avian species. It is defined by partial or complete loss of plumage coloration. Unlike albinism, which results in ocular depigmentation, leucistic birds have normal iris color. Pigment abnormalities within wild bird populations are rare. In the order Strigiformes, such cases have mainly been recorded as individual reports. This research introduces the first documented case of complete leucism in the Long-eared owl (

Indexed as

Asio otusBulgarialeucismLong-eared owlpigmentary anomaliesStrigiformeswild birds

Identifiers

PMID42883450
PMCPMC13664618

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.