About food storage by Rooks. - I.R. Merzlikin, A.V. Sheverdyukova. - Berkut. 14 (1). 2005. - P. 141-142.
Observations on birds hided Circassian walnuts are described (Sumy, NE Ukraine). [Russain].
Key words: Rook, Corvus frugilegus, behaviour, feeding, food storage.
Address: I.R. Merzlikin, Lushpa str. 20/1-45, 40034 Sumy, Ukraine; e-mail: mirdao@mail.ru.