<a href="https://en.wikipedia.org/wiki/Fourpence_(British_coin)" class="extiw" title="w:Fourpence (British coin)">Fourpence</a> stamp of the "British Birds" pictorial series, issued by the <a href="https://en.wikipedia.org/wiki/General_Post_Office" class="extiw" title="w:General Post Office">General Post Office</a> in 1966: this stamp shows a <a href="https://en.wikipedia.org/wiki/blue_tit" class="extiw" title="w:blue tit">blue tit</a> hanging upside down, eating a green <a href="https://en.wikipedia.org/wiki/caterpillar" class="extiw" title="w:caterpillar">caterpillar</a>.
John Norris Wood, for the <a href="https://en.wikipedia.org/wiki/General_Post_Office" class="extiw" title="w:General Post Office">General Post Office</a>.
Scanned by <a href="//commons.wikimedia.org/wiki/User:Minoa" title="User:Minoa">Minoa</a> from the original presentation pack with the Epson Perfection V600 (via <a href="https://en.wikipedia.org/wiki/VueScan" class="extiw" title="w:VueScan">VueScan</a>), resolution 2,400 <a href="https://en.wikipedia.org/wiki/Pixel_density" class="extiw" title="w:Pixel density"><abbr title="pixels per inch">ppi</abbr></a>.