Crested penguins
... that the first egg laid in a clutch by Crested penguins of the genus Eudyptes is as little as 60% of the size of the second egg?
... that the first egg laid in a <a href="./Clutch_(eggs)" id="mwBUY" rel="mw:WikiLink" title="Clutch (eggs)">clutch</a> by <b id="mwBUc"><a href="./Crested_penguin" id="mwBUg" rel="mw:WikiLink" title="Crested penguin">Crested penguins</a></b> <i id="mwBUk">(pictured)</i> of the <a href="./Genus" id="mwBUo" rel="mw:WikiLink" title="Genus">genus</a> <i id="mwBUs">Eudyptes</i> is as little as 60% of the size of the second egg?