CORNWALL'S BARTINNEY BUZZING WITH RARE BEES

PUBLISHED: 16:06 11 September 2014 | UPDATED: 13:15 30 August 2017

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Bartinney Nature Reserve near Sennen in west Penwith is home to two very rare species of bee

Cornwall Wildlife Trust has discovered two very rare species of bee on their new Bartinney Nature Reserve near Sennen in west Penwith. The tormentil nomad bee is so rare that it is only currently known at one other site in the south west, near Davidstow. This species uses the nests of another rare bee, the tormentil mining bee (Andrena tarsata), also discovered at Bartinney. Both are moorland species that have undergone a dramatic decline since the 1970s.

“The tormentil mining bee (Andrena tarsata) needs lots and lots of flowering tormentil very near to nest sites, from which to collect pollen to feed their larvae that live in small chambers slightly underground. It is unusual to find such big colonies of tormentil mining bee and the Trust’s Bartinney Nature Reserve, with its big drifts of flowering tormentil, is clearly an important site for them," says Paddy Saunders, the invertebrate expert who discovered both species of bee during a survey for Natural England says.

“The tormentil nomad bee (Nomada robertjeotiana) is a cuckoo’ bee and goes into the nests of tormentil mining bee and steals its nest and stored pollen. It hangs around and nips into the tomentil mining bee’s nest where it lays an egg. Once hatched the nomad’s larvae eats all the pollen that the other bee has done all the hard work to collect! It needs a big tormentil mining bee colony to sustain a population of the nomad, so it is a super rare bee only currently known on three sites nationally. The fact that Bartinney Nature Reserve supports both these rare bees is very significant.”

Liz Cox, Wild Penwith Project Manager for Cornwall Wildlife Trust adds: “Bartinney Nature Reserve is one of the two reserves that the Trust recently bought thanks to public donations and funding from the Heritage Lottery Fund, and I am sure everyone involved will be thrilled to know that the site is already playing an important role in protecting Penwith’s wildlife!”

Andrew Whitehouse, South West Manager at Buglife said: “Both of these bees have been identified by our South West Bees Project as being in need of conservation action. We are encouraged to find that both species have been found at Bartinney, and we hope to work closely with Cornwall Wildlife Trust and Natural England to ensure that these nationally important populations thrive.”

cornwallwildlifetrust.org.uk/nature_reserves

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