Goldcrest <i>Regulus regulus</i> nest and eggs. "A lovely engraving from a scarce British Victorian natural history book."
Unknown author<span style="display: none;">Unknown author</span>
circa 1831 <div style="display: none;">date QS:P,+1831-00-00T00:00:00Z/9,P1480,Q5727902</div>
<cite class="book" style="font-style:normal">(1831) <i> The Library of Entertaining Knowledge: The architecture of birds</i>, <a href="https://en.wikipedia.org/wiki/en:London" class="extiw" title="w:en:London"><span title="capital and largest city of the United Kingdom">London</span></a>:  Charles Knight, pp. 317  <small></small></cite> <a rel="nofollow" class="external text" href="http://www.possumsprints.com/antique-bird-nest-eggs-goldcrest-engraving-print-c1852-2068-p">also here</a>