div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: The Coloration of Birds Eggs src=https:reader030vdocumentssitereader030viewer2022020522575067a81a28ab0f07ac8e5dhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp© 1908 Nature Publishing Grouppdiv