Theobald Johannes Krüper (1829-1921). German by birth. Connoisseur and collector of the avifauna of Greece and Turkey. Collected the Turkish nuthatch near Smyrna (Izmir) in 1862. August von Pelzeln (Vienna) described the species in his honor as Sitta. krueperi. Founder of the bird collection of the Museum of the University of Athens.
Still going on expeditions in his seventies. Ate nothing but olives.