16/07 17:50 : 13 COMMON CROSSBILLS : Gerrards Cross.
Second flock of the day, arrived from the NW, landed briefly in a Spruce tree, then headed off south. Both flocks today very agitated and flighty with constant calling, presumably desperate to find ripe cones (Rob Andrews)
Earlier, RDA had discovered a flock of 16 birds in Chalfont St Giles.