heath fritillary butterflies

About us

CBMS is a registered charity formed by some of Cornwall’s most knowledgeable butterfly and moth enthusiasts to manage conservation sites, carry out breeding studies and help preserve some of Cornwall’s most threatened wildlife. CBMS was formed in response to the

Clearing invasive species at Wheal Jane - he's been called worse.

Getting involved

CBMS welcomes all, regardless of experience, to join in with conservation management, studies, recording, field trips and group events. The satisfaction and enjoyment of helping to preserve some of Cornwall’s threatened species is something everyone can experience. To find out

Penhale Sands

Field meetings 2015

Everyone is welcome to join in with our exciting program of 2015 butterfly and moth field trips.  The complete agenda, organised by Lee Slaughter who is celebrating 23 glorious summers of arranging Butterfly & Moth meetings across Cornwall and led by some of


Conservation sites

CBMS helps manage three very exciting conservation sites which together offer a real insight into Cornwall’s rich heritage and natural history. They contain many of Cornwall’s most precious butterflies and moths. Excitingly, there are areas yet to be fully surveyed!

marsh fritillary butterfly


CBMS latest news of events, sightings, breeding studies, conservation work and individuals observations are regularly reported here.

Be a part of CBMS and help the butterflies and moths of Cornwall

Whether it's volunteering to work on the conservation sites, raising money, becoming a member, making a donation...we need you!

Get involved

Small Pearl-bordered Fritillary breeding account

Small Pearl-bordered Fritillary Butterfly

Reasons for selecting the Small Pearl-bordered Fritillary 1 – The SPBF is a common butterfly in much of Cornwall and the group felt it would provide a good introduction to understanding breeding Lepidoptera on a large scale. 2 – The

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Messages from the Trustees of CBMS

With so many knowledgeable members I'm incredibly excited that by bringing together this wealth of experience we have the opportunity to help preserve some of Cornwall's most endangered species.

Barry Ofield Trustee