Did you know that Cretzschmar was a German physician? He was born at Sulzbach and studied medicine at the University of Würzburg. He taught anatomy and zoology at the Senckenberg Medical Institute of Frankfurt.
No, I don't care either. It's just that I saw a pair of Cretzschmar's Buntings while I was holidaying on the Aegean. The male in particular is much prettier - and easier to cope with - than his name. It's not a common bird, apparently, not as common as, say, Ortolan Bunting, which despite a lot of searching I did not manage to see or hear. But that's birding for you.