J.G. Keulemans lithograph, Cecinus viridis (Green Woodpecker) c1878.
Keulemans hand-coloured lithograph. Oestrelata Defilippiana Petrels. c1875
Keulemans Indicator Barianus. Honeyguides. c1875
Keulemans lithograph of Phainoptila Melanonoxantha Flycatchers c1875
Keulemans Cuckoo antique print. Cuculus canorus. Lithograph c1870.