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Supplemental Information

IUCN Red List Status for Aves

DOI: 10.7287/peerj.preprints.3379v1/supp-1

R code to perform simulation analyses

DOI: 10.7287/peerj.preprints.3379v1/supp-2

R Code to perform paleobiology database analyses

DOI: 10.7287/peerj.preprints.3379v1/supp-3

R code to perform eBird database analyses

DOI: 10.7287/peerj.preprints.3379v1/supp-4

Additional Information

Competing Interests

The author declares that he has no competing interests.

Author Contributions

James Boyle conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Data Deposition

The following information was supplied regarding data availability:



The eBird dataset is publicly available from and the R code and additional data needed to process it are provided as supplemental files.


The author received no funding for this work.

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