Horsefly illustration from Churui Gafu (1910) by Morimoto Toko. Digitally enhanced from our own original edition. https://www.rawpixel.com/image/560526/horseflies-plantFree Image from public domain licenseAbdominal anatomy of the horse shown with examples of gadflies: six figures showing the kidneys, bladder and large… https://www.rawpixel.com/image/13998126/image-paper-butterfly-heartFree Image from public domain license