Gru
Arcamone E., Dall’Antonia P. & Puglisi L. 2007. Lo svernamento degli uccelli acquatici in Toscana. 1984-2006. Regione Toscana.
Baccetti N., Dall’Antonia P., Magagnoli P., Melega L., Serra L., Soldatini C. & Zenatello M. 2002. Gru. Biol. Cons. Fauna 111: 122.
BirdLife International. 2004. Birds in the European Union: a status assessment. BirdLife International, Wageningen.
BirdLife International. 2008. Common Crane Grus grus . Species factsheet. www.birdlife.org.
Cramp S. & Simmons K.E.L. 1980. The Birds of the Western Palearctic. Oxford University Press, Oxford. Volume II.