Support the extension
Sander Bot ( www.xeno-canto.org )
The Nutcracker is hardly seen in western Europe, but sometimes there are winter invasions and at those times we see them in great numbers. Probably a lack of food causes those winter invasions.
http://en.wikipedia.org/wiki/Nucifraga_caryocatactes
http://eol.org/pages/917366/maps