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"British Wildlife is the pulsating heart of the UK nature conservation movement"

Matthew Oates, National Trust

"The most important and informative publication on wildlife of our times"

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"Packed with readable, thoughtful, up to date articles; written by ecologists and naturalists for ecologists and naturalists"

Nick Baker, Presenter and Naturalist

From issue:   Issue:   British Wildlife 02.3 February 1991

The Native Crayfish and Threats to its Existence

By - David Holdich

The majority of freshwater invertebrates are relatively small, the two exceptions being the decapod crustaceans and some bivalve molluscs. By far the largest mobile invertebrate in the British Isles is the crayfish. After the last ice-age a sinlge species, the White-clawed or Atlantic Stream Crayfish, came to inhabit our waters. Whether it was introduced from mainland Europe (where it is widespread) or derived from relict populations is uncertain.

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"British Wildlife is the pulsating heart of the UK nature conservation movement."

Matthew Oates, National Trust

"The most important and informative publication on wildlife of our times"

Michael McCarthy, The Independent

"Packed with readable, thoughtful, up to date articles; written by ecologists and naturalists for ecologists and naturalists"

Nick Baker, Presenter and Naturalist