Spanò, S., Pellegrino, I., & Borgo, E. (2013). On the systematic status of the Cyrenaic Partridge (Alectoris barbata Reichenow, 1896). Avocetta 37: 145-148.
PDF from CISO – Centro Italiano Studi Ornitologici
Abstract:
Some considerations on the morphological features that differentiate Alectoris barbara barbata from A. b. barbara are exposed, and are also reported the results of a genetic investigation performed on historical specimens. Results showed a considerable genetic distance (0.06), certainly enough to consider it an ESU (Evolutionary Significant Unit), but most likely a separate species.
North African Birds 