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Bats move into newly built barn after road upgrade

CEC A close up of a long eared bat being held by a person's hand wearing a white gloveCEC
Long-eared bats are among four species roosting in the new barn

Bats have been found roosting in a purpose-built barn next to a major road upgrade.

The bespoke bat house was built in 2022 near a new stretch of dual-carriageway on the A30 in Cornwall that opened earlier this year.

The building was part of a number of environmental mitigation measures for National Highways’ A30 Chiverton to Carland Cross scheme.

Experts said they were "delighted" four species of bat are already living there.

CEC A stone barn with a slate roof and black guttering and a brown wooden door set next to a brown fence and with blue sky and clouds, some trees and grass around itCEC
The insulated barn was built with Cornish stone and slate with features such as bat tubes and special crevices

'Feel comfortable'

Steve Marshall, principal bat ecologist at Cornwall Environmental Consultants Ltd, said: “We were delighted to see evidence of bats moving into the bat house last year, and even more pleased this year to record four species of bats, including Lesser Horseshoes, roosting for the first time.

“Bats can be difficult to mitigate for and typically take more time to colonise new roost sites, but they obviously feel comfortable using this one."

CEC A black and white grainy thermal image of a stone building with three small windows and a slate roof and a speck of bright light to the right which is the bat flying outCEC
Thermal imaging captured bats coming and going from the bat barn

There has also been recorded activity of brown, long-eared and common pipistrelle and myotis bat species.

Emma Stuart, environmental advisor with construction firm Costain said the activity showed how much the barn "will help the local bat population."

"We didn't think it would be this soon because there is still activity going on in the area with construction works," she said.

CEC Two black lesser horseshoe bats hanging on the wall next to each other inside a barnCEC
Lesser horseshoe bats pictured in the barn

Neil Winter, National Highways senior project manager, said he was "proud" of the work to protect and enhance the ecology and environment around the 8.7 mile (14km) stretch of new road.

"This includes the bat mitigation, wildlife-proof fencing, Cornish hedging and heathland relocating, and we’re currently forecasting a net gain of over 20% in biodiversity," he said.

The new dual-carriageway opened in June, but the wider scheme is continuing with ancillary and finishing-up works.

As part of the licence conditions for the project, monitoring of all ecology measures, including the bat barn, will continue until 2032.

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