Recently, many British butterflies have suffered severe declines whole others have flourished and expanded in range. This is the first book to describe the results from a British scheme to monitor butterflies during this period of change. The Monitoring Scheme, initiated in 1976 by the senior author is based on frequent counts at some 90 sites throughout Britain. The combined efforts of both amateurs and professionals have thus produced a dataset with no equivalent elsewhere in the world. The book therefore provides a unique perspective on trends in numbers, extinction and foundation of populations; flight periods, local distributions, migration and other aspects of population ecology. Practical problems encountered during the conservation of butterflies of individual sites are outlined. The relevance of this monitoring for an understanding of the effects of the weather - climatic warming - is described.
Publisher: Chapman and Hall
Number of pages: 274
Weight: 1300 g
Dimensions: 235 x 155 x 17 mm
Edition: 1993 ed.
`This book is well laid out with clear graphs and tables ... a very well presented examination of current work and a valuable contribution to our developing understanding of this best studied group of insects.'
British Journal of Entomology and Natural History
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