The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.
The Ancestry of Birds
Overview
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
In the citing paper
“Although the shoulder joint of non-avian paravians has a laterally facing glenoid, this articulation still restricted the humerus to motions beneath the horizontal plane, unlike the full dorsal extension possible in extant birds for flapping flight [4], [11], [75] and arboreal mammals [76].”
From Assessing Arboreal Adaptations of Bird Antecedents: Testing the Ecological Setting of the Origin of the Avian Flight Stroke (2011) · cites this paper as [4]
Citations
Cites
(1926) · University of Michigan Library Repository · Cited by 200
New light on the Origin of Birds and Crocodiles
WALKER, A. D. (1972) · Nature · doi:10.1038/237257a0 · Cited by 164
A new specimen of Stenonychosaurus from the Oldman Formation (Cretaceous) of Alberta
Russell, D. A. (1969) · Canadian Journal of Earth Sciences · doi:10.1139/e69-059 · Cited by 121
Broom, R. (1905) · Transactions of the South African Philosophical Society · doi:10.1080/21560382.1905.9526071 · Cited by 19
Research works printed but not linked: 3
- Ostrom, J. H., Proc. Koninkl. Neder. Akad. Wetensch., B, 75, 4 (1972).
- Camp, C. L., Bull. Geol. Sci. Univ. California, 24, 39 (1936).
- Osborn, H. F., Amer. Mus. Nat. Hist. Novitates, 144, 1 (1924).
Cited by
The origin and early evolution of birds
PADIAN, K., & CHIAPPE, L. M. (1998) · Biological Reviews · doi:10.1111/j.1469-185x.1997.tb00024.x · Cited by 284
Archaeopteryx and the origin of birds
OSTROM, J. H. (1976) · Biological Journal of the Linnean Society · doi:10.1111/j.1095-8312.1976.tb00244.x · Cited by 361
Self-citationThe origin and early radiation of dinosaurs
Brusatte, S. L., Nesbitt, S. J., Irmis, R. B., Butler, R. J., Benton, M. J., & Norell, M. A. (2010) · Earth-Science Reviews · doi:10.1016/j.earscirev.2010.04.001 · Cited by 305
“This was not a new idea: it had been proposed as early as the 1860s (e.g., Huxley, 1868, 1870a,b), but had fallen out of favor until the pioneering studies of John Ostrom in the 1960s (e.g., Ostrom, 1969, 1973).”
BackgroundInitiation of mammalian protein synthesis
Schreier, M. H., Erni, B., & Staehelin, T. (1977) · Journal of Molecular Biology · doi:10.1016/0022-2836(77)90268-6 · Cited by 340
The phylogenetic position of the Tyrannosauridae: implications for theropod systematics
Holtz, T. R. (1994) · Journal of Paleontology · doi:10.1017/s0022336000026706 · Cited by 267
Metadata
- Authors
- OSTROM, J. H.
- Affiliations
- Yale University (US)
- Corresponding author
- OSTROM, J. H.
- Venue
- Nature
- Published
- 1973-03-09
- Volume
- 242
- Issue
- 5393
- Pages
- 136-136
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2015158937
- Cited by
- 168
- References
- 4
- Citations by year
- 2026: 1 · 2025: 3 · 2024: 2 · 2023: 3 · 2021: 2 · 2020: 4 · 2019: 2 · 2018: 4 · 2017: 4 · 2016: 6 · 2015: 1 · 2014: 2 · 2013: 4 · 2012: 5
- FWCI
- 28.90
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springernature.com/gp/researchers/text-and-data-mining (tdm)
- www.springernature.com/gp/researchers/text-and-data-mining (vor)
- Locations
- Nature (publishedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Evolutionary Biology
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Plant Diversity and Evolution
- Keywords
- avian evolution, crocodilians, archosaurs, common ancestor, phylogenetic relationships, evolutionary ancestry
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: The Ancestry of Birds. https://app.cochat.ai/papers/10.1038/242136a0
- The paper
- OSTROM, J. H. (1973). The Ancestry of Birds. Nature. https://doi.org/10.1038/242136a0
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
