RADAR AND THE BIRD MIGRANTS: AND OTHER ASPECTS OF THE ANNUAL MIRACLE OF AUTUMNAL FLIGHT
... T n October countless millions of migratory birds are on the move in North- Western Europe, and as our summer visitors the birds which nest here but seek more congenial winter quarters fly away in their great droves, others come to take their place. This influx of the hardier travellers, who come to find winter quarters in the British Isles, occupies the whole of October and November. They ...