div class=trans-pagebuttonPage 1button div class=trans-image a href=https:reader042fdocumentsecreader042viewer20220330025695d45b1a28ab9b02a12c84html5page1jpg target=_blank amp-img class=trans-thumb alt=Page 1: Clave Dicotomica Aves-mamíferos src=https:reader042fdocumentsecreader042viewer20220330025695d45b1a28ab9b02a12c84html5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divpAVESpdivdiv class=trans-pagebuttonPage 2button div class=trans-image a href=https:reader042fdocumentsecreader042viewer20220330025695d45b1a28ab9b02a12c84html5page2jpg target=_blank amp-img class=trans-thumb alt=Page 2: Clave Dicotomica Aves-mamíferos src=https:reader042fdocumentsecreader042viewer20220330025695d45b1a28ab9b02a12c84html5thumbnails2jpg width=142 height=106 layout=responsive amp-imga divpMAMÍFEROSpdiv