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Notes

01 January 1975 Comments Notes ... Read More

The "Invasion" type of bird migration

01 August 1957 Comments Main paper FOOD-SHORTAGE IS generally assumed to be involved in those emigrations that are called " i r r u p t i o n s " or " i n v a s i o n s " (these terms of course, being applied in the areas into which the birds come). W h a t it seemed most urgent to explain... Read More

Reviews

01 January 1952 Comments Reviews A History of the Birds of Durham. By G. W. Temperley (Trans. Nat. Hist. Soc. of Northumberland, Durham and Newcastle-upon-Tyne (New Series) vol. ix, 1951). Price 15s. The County of Durham has in the past been overshadowed by its larger neighbour Northumbe... Read More

The status of the Black-headed Gull colony at Ravenglass

01 January 1952 Comments Main paper there is an interesting association of several species of sea and shore birds breeding on the Drigg sandhills opposite Ravenglass in large numbers, the site has received little serious study and is generally known only for the size of the colony of Black-... Read More