Regression line plotted on logarithmic x-y axes showing the correlation between the Volumes of the Lungs (VL) of birds on which data are available against Body Masses (BM).

<p>The values of the three specimens of the Andean goose (<i>Chloephaga melanoptera</i>) that were investigated in this study lie above the common regression line of the bird population. The data on which the regression line was plotted are summarized in publications [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0174395#pone.0174395.ref033" target="_blank">33</a>], [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0174395#pone.0174395.ref037" target="_blank">37</a>], [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0174395#pone.0174395.ref039" target="_blank">39</a>] and [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0174395#pone.0174395.ref054" target="_blank">54</a>–<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0174395#pone.0174395.ref056" target="_blank">56</a>] and are given in data supporting this paper (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0174395#pone.0174395.s008" target="_blank">S8 Table</a>).