TY  - BOOK
AU  - Birkhead,Tim
TI  - The magpies: the ecology and behaviour of black-billed and yellow -billed Magpies 
SN  - 0856610674
PY  - 1991///
CY  - London
PB  - T & A D Poyse
KW  - Magpies
KW  - Yellow-billed magpie
ER  -