Johannes Gerardus Keulemans: A Life in Feather and Brush Johannes Gerardus Keulemans (1842-1912) stands as a towering figure within the annals of Victorian ornithological illustration, an artist whose meticulous dedication to detail and unwavering commitment to scientific accuracy cemented his legacy as one of the era’s foremost natural history painters. Born in Rotterdam on June 8th, 1842, Keulemans possessed from youth an innate fas…