Cretzschmar's bunting breeds on sunny open hillsides with some bushes. It is mainly coastal or insular, and often breeds at lower levels than the closely related ortolan bunting where both occur. It lays four to six eggs in a ground nest. Its natural food consists of seeds and when feeding young, insects.
This bird is smaller than ortolan. The breeding male has a grey head with orange moustaches. The upperparts are brown and heavily streaked, except on the rump, and the underparts are rusty orange. The stout bill is pink.
Females and young birds have a weaker head pattern, and are more similar to ortolans. They can be distinguished by the warm brown rump and white eye-ring.
The English name commemorates the German physician and scientist Philipp Jakob Cretzschmar who founded the Senckenberg Natural History Museum. The genus name Emberiza is from Old German Embritz, a bunting. The specific caesias is from Latin caesius, "bluish-grey".
- BirdLife International (2012). "Emberiza caesia". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
- Beolens, Bo; Watkins, Michael (2003). Whose Bird? Men and Women Commemorated in the Common Names of Birds. London: Christopher Helm. p. 94.
- Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London, United Kingdom: Christopher Helm. pp. 83, 145. ISBN 978-1-4081-2501-4.