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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 11.6 August 2000

When do frogs emerge from hibernation (and how do we know)?

By - Duncan Brown

In the June 1999 issue of British Wildlife, Ken Tyson and Roger Smith (1999) described the seasonal emergence pattern of Common Frog Rana temporaria spawn. They related the first spawning dates for a site near Okehampton in Devon between 1990 and 1999 to the accumulated day degrees of temperature above freezing from the shortest day (21st December) to the date of first spawning for each year.

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More from 'BW 11.6 - 210663 '

"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