Illustration of subspecies of Blue Tit (<i>Cyanistes caeruleus</i>) from the Canary islands
<bdi><a href="https://en.wikipedia.org/wiki/en:Henrik_Gr%C3%B8nvold" class="extiw" title="w:en:Henrik Grønvold"><span title="Danish illustrator (1858-1940)">Henrik Grønvold</span></a>
</bdi>
circa 1920 <div style="display: none;">date QS:P,+1920-00-00T00:00:00Z/9,P1480,Q5727902</div>
Scanned from <i>Amazing Rare Things: The Art of Natural History in the Age of Discovery</i>