Mean body mass of the 12 studied sea duck species and their respective six genera, according to a literature review.

<p>Note: Species and genera are presented in increasing order of mass. n represents the total number of individuals included in the mean (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0065667#s2" target="_blank">Methods</a> for details on computations). Data are means ± SD.</p><p>a: P.L. Flint, unpublished data;</p><p>b: J.-F. Ouellet, unpublished data;</p><p>c: F. Merkel, unpublished data.