John Gerrard Keulemans, or J.G. Keulemans, was a Dutch bird illustrator who illustrated several of John Whitehead’s ornithological discoveries, including Whitehead’s very first discovery from Corsica/Spain in 1885, Whitehead’s Nuthatch (Sitta whiteheadi). A decade later, J.G. Keulemans illustrated John Whitehead’s Philippine discoveries, which were published in a series of articles in The Ibis journal.
