Ethics of conservation and sustainable use feature prominently in falconry through the ages. Early veterinary practices in Bagdad date to about 780 AD, and mapping of goshawk eyries in Domesday Cheshire, UK, dates to 1086 AD. The Art of Falconry, “De Arte Venandi cum Avibus” (1248), by Emperor Frederick II, is widely recognized as the first comprehensive written work on falconry, and is a significant example of the relationship between falconry and conservation because of its contribution to ornithology.