Evidence map›Paper›PMID 30930524›Full record

ReviewBehavioral ecology and sociobiology2019

What constitutes "social complexity" and "social intelligence" in birds? Lessons from ravens.

Palmyre H Boucherie, Matthias-Claudio Loretto, Jorg J M Massen, Thomas Bugnyar

Open access · hybridAbstract readReview
In one paragraph

Review in Behavioral ecology and sociobiology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed
16.7field-weighted citation impact, top 1% of its field
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

47 citing papers in PubMed, 100 citations in OpenAlex.

  1. Article
  2. Neural basis of social hierarchy across species.Nature reviews. Neuroscience · 2026
    Review
  3. Article
  4. Article
  5. Article
  6. Review
  7. The coevolution of cognition and sociality.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  8. Group traits moderate the relationship between individual social traits and fitness in gorillas.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  9. Social learning and culture in birds: emerging patterns and relevance to conservation.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  10. Article
  11. Article
  12. Article
  13. The secret social life of solitary mammals.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  14. Using global remote camera data of a solitary species complex to evaluate the drivers of group formation.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  15. Article
  16. Article
  17. Primate social organization evolved from a flexible pair-living ancestor.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  18. Article
  19. Article
  20. Article
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

4 authors at 1 institution in 1 country.

Palmyre H Boucherie1Department of Cognitive Biology, University of Vienna, Vienna, Austria.
Matthias-Claudio Loretto1Department of Cognitive Biology, University of Vienna, Vienna, Austria.
Jorg J M Massen1Department of Cognitive Biology, University of Vienna, Vienna, Austria.
Thomas Bugnyar1Department of Cognitive Biology, University of Vienna, Vienna, Austria.
University of Vienna · AT

Funding

Austrian Science Fund FWF P 29705Austrian Science Fund FWF Y 366
6 · The paper itself

Abstract

In the last decades, the assumption that complex social life is cognitively challenging, and thus can drive mental evolution, has received much support from empirical studies in nonhuman primates. While extending the scope to other mammals and birds, different views have been adopted on what constitutes social complexity and which specific cognitive skills are selected for. Notably, many avian species form "open" groups as non-breeders (i.e., seasonally and before sexual maturity) that have been largely ignored as potential sources of social complexity. Reviewing 30 years of research on ravens, we illustrate the socio-ecological conditions faced by these birds as non-breeders and discuss how these relate to their socio-cognitive skills. We argue that the non-breeding period is key to understand raven social life and, to a larger extent, avian social life in general. We furthermore emphasize how the combination of the large-scale perspective (defining social system components: e.g., social organization, mating system) and the individual-scale perspective on social systems allows to better capture the complete set of social challenges experienced by individuals throughout their life, ultimately resulting on a more comprehensive understanding of species' social complexity.

Indexed as

CorvidsMonogamyNon-breeding periodSocial cognitionSocial complexity

Identifiers

PMID30930524
PMCPMC6404394
OpenAlexW2908535830

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.