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Matthew Oates, National Trust

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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 32.2 November 2020

Unravelling the mysteries of autumn swarming by bats

By - John Altringham

When John Altringham witnessed hundreds of bats swarming around the entrance of a disused mine in Canada, he was filled with questions as to why these bats were exhibiting this behaviour at such an unusual time of year. John returned to the UK and studied bat swarming on the Yorkshire Dales to answer these questions, and here he shares his story of over 20 years of research.

In August 1996, I visited eastern Canada to assist Brock Fenton (then at York University, Toronto) in running a bat-ecology field course. We visited a small, disused mine in the Ontario backwoods and in just a few hours, with a simple home-made harp trap across its door-sized entrance, we caught several hundred bats of at least seven species.

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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