Quellen und Links
- Yosef, R., International Shrike Working Group, Sharpe, C.J., Marks, J.S. & Kirwan, G.M. (2019). Great Grey Shrike (Lanius excubitor). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/60482 on 21 February 2019).
- Kartenvorlage: Karte: NordNordWest, Lizenz: Creative Commons by-sa-3.0 de