The Auk.
- Washington, D.C. American Ornithologists' Union
- volumes illustrations 24 cm
- Quarterly
- Began with: Vol. 1, No. 1 (Jan. 1884); ceased with: Vol. 134, issue 4 (2017).
"A quarterly journal of ornithology." "International journal of the American Ornithologists' Union," <2014-> Issues for Jan. 2014- have subtitle: Ornithological advances. Continued online only after the last print issue in 2017. Oxford University Press took over publication in January 2019.
Chemical abstracts 0009-2258
Vols. 1-53 called new series, also old series, v. 9-61.