Reference health
Mass extinction of birds at the Cretaceous–Paleogene (K–Pg) boundary
32/32 checkable references clean · checked 2026-07-14
Every reference with a DOI in the deposited reference list resolved to a known work in Crossref or DataCite at the dated check, and none carried a publisher retraction, withdrawal, or removal notice.
10 without a DOI — not checked. A reference deposited without a DOI is never matched by title or guessed at; it stays outside the checked set, and this line discloses that.
The 32 checked references that resolve
resolves10.2307/2666178
100 Million Years of Land Vertebrate Evolution: The Cretaceous-Early Tertiary Transition
resolves10.1038/nature03150
Definitive fossil evidence for the extant avian radiation in the Cretaceous
resolves10.1206/0003-0082(2002)386<0001:ANPBAA>2.0.CO;2
A New Presbyornithid Bird (Aves, Anseriformes) from the Late Cretaceous of Southern Mongolia
resolves10.1126/science.1177265
The Chicxulub Asteroid Impact and Mass Extinction at the Cretaceous-Paleogene Boundary
resolves10.1130/SPE247-p549
Differential Cretaceous/Tertiary extinctions of nonmarine vertebrates; Evidence from northeastern Montana
resolves10.1126/science.275.5303.1109
Mass Survival of Birds Across the Cretaceous- Tertiary Boundary: Molecular Evidence
resolves10.1098/rsbl.2006.0523
Diversification of Neoaves: integration of molecular sequence data and fossils
resolves10.1080/02724631003620955
New latest Cretaceous mammals from northeastern Colorado with biochronologic and biogeographic implications
resolves10.1139/e01-073
The paleoenvironment of<i>Tyrannosaurus rex</i>from southwestern Saskatchewan, Canada
resolves10.1080/02724634.1985.10011851
A new family of bird-like dinosaurs linking Laurasia and Gondwanaland
resolves10.1671/0272-4634(2000)020[0712:AAQFTL]2.0.CO;2
An avian quadrate from the Late Cretaceous Lance Formation of Wyoming
resolves10.1016/j.cretres.2008.06.007
An ornithurine-dominated avifauna from the Belly River Group (Campanian, Upper Cretaceous) of Alberta, Canada
resolves10.1111/j.1469-7580.2008.00880.x
Insight into diversity, body size and morphological evolution from the largest Early Cretaceous enantiornithine bird
resolves10.1016/j.cretres.2009.09.001
Description and ecologic analysis of Hollanda luceria, a Late Cretaceous bird from the Gobi Desert (Mongolia)
resolves10.1016/j.cretres.2006.05.001
A re-analysis of the marine bird Asiahesperornis from northern Kazakhstan
resolves10.1080/02724634.2011.541013
The first definitive record of a fossil bird from the Upper Cretaceous (Maastrichtian) of the Haţeg Basin, Romania
resolves10.1206/0003-0082(2001)323<0001:ANCBFT>2.0.CO;2
A New Carinate Bird from the Late Cretaceous of Patagonia (Argentina)
resolves10.1080/02724634.2010.483544
A Late Cretaceous (Maastrichtian) avifauna from the Maevarano Formation, Madagascar
The 10 references without a DOI — listed, not checked
no DOI — not checkedLM Chiappe Glorified Dinosaurs (Wiley, Hoboken, NJ), pp. 263 (2007).
no DOI — not checkedA Feduccia The Origin and Evolution of Birds (Yale Univ Press, New Haven, CT, 1996).
no DOI — not checkedCC Labandeira, KR Johnson, P Lang, Preliminary assessment of insect herbivory across the Cretaceous-Tertiary boundary: Major extinction and minimum rebound. GSA Special Paper 361, 297–327 (2002).
no DOI — not checkedE Buffetaut, Giant ground birds at the Cretaceous-Tertiary boundary: Extinction or survival? GSA Special Paper 356, 303–306 (2002).
no DOI — not checkedP Brodkorb, Birds from the Upper Cretaceous of Wyoming. Proceedings of the XIII International Ornithological Congress (Ithaca, NY, 1955–70. (1963).
no DOI — not checkedS Hope, The Mesozoic record of Neornithes (modern birds). Mesozoic Birds: Above the Heads of Dinosaurs, eds LM Chiappe, LM Witmer (University of California Press, Berkeley, CA), pp. 339–388 (2002).
no DOI — not checkedJF Hicks, KR Johnson, JD Obradovich, L Tauxe, D Clark, Magnetostratigraphy and geochronology of the Hell Creek and basal Fort Union Formations of southwestern North Dakota and a recalibration of the age of the Cretaceous-Tertiary boundary. GSA Special Paper 361, 35–56 (2002).
no DOI — not checkedLM Chiappe, CA Walker, Skeletal morphology and systematics of the Cretaceous Euenantiornithes. Mesozoic Birds: Above the Heads of Dinosaurs, eds LM Chiappe, LM Witmer (University of California Press, Berkeley, CA), pp. 241–267 (2002).
no DOI — not checkedEN Kurochkin, Mesozoic birds of Mongolia and the former USSR. The Age of Dinosaurs in Russia and Mongolia, eds MJ Benton, MA Shishkin, DM Unwin, EN Kurochkin (Cambridge Univ Press, Cambridge, UK), pp. 533–559 (2000).
no DOI — not checkedDL Swofford PAUP*: Phylogenetic Analysis Using Parsimony (*and Other Methods) (Sinauer, Sunderland, MA, 4.0b10. (2002).
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work were clean at the dated check: each resolved to a known work in a public registry, and none
carried a publisher retraction notice at that time. It says nothing about the quality, findings,
or importance of the work itself, and nothing about references deposited without a DOI.
checked 2026-07-14 — re-checked daily as this page is visited; titles and statuses come from Crossref and DataCite and are not part of the signed record
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