Evidence map›Paper›PMID 42903322›Full record

ArticleEcology and evolution2026

Wild Carrion Crows Choose Walnuts Based on Visual and Weight Cues.

Torito Hamano, Yurika Mitsuhashi, Noriko Kondo, Masaki Shimada, Akitsugu Konno

Abstract read
In one paragraph

Article in Ecology and evolution, 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

5 authors.

Torito HamanoDepartment of Animal Sciences Teikyo University of Science Uenohara Yamanashi Japan.
Yurika MitsuhashiDepartment of Animal Sciences Teikyo University of Science Uenohara Yamanashi Japan.
Noriko KondoGraduate School of Arts and Sciences The University of Tokyo Tokyo Japan.
Masaki ShimadaDepartment of Animal Sciences Teikyo University of Science Uenohara Yamanashi Japan.
Akitsugu KonnoDepartment of Animal Science and Biotechnology Azabu University Sagamihara Kanagawa Japan.ORCID https://orcid.org/0000-0003-2517-7761

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Assessment of the physical properties of concealed food items provides insight into the perceptual and cognitive mechanisms of animals. This study investigated the walnut selection behavior of wild carrion crows (

Indexed as

crowsdecision‐makingdiscriminationforaging behaviorphysical cognitionwalnuts

Identifiers

PMID42903322
PMCPMC13681255

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.