Case Study

A Bat Survey in St Lawrence, Jersey

Arbtech undertook a Preliminary Roost Assessment (PRA) on an 18th Century Farmhouse in St. Lawrence that was proposed to be renovated as a dwelling.

The PRA confirmed that the building was both a summer and likely winter day roost for pipistrelle bats. Samples of droppings collected around the building were DNA analysed at the University of Warwick and this confirmed the presence of common pipistrelle Pipistrellus pipistrellus as well as the island’s lesser white toothed shrew Crocidura suaveolens.

The Company was able to take this information and form a precautionary Method Statement that allowed the Department of the Environment to issue a bat licence for the works. This saved the client very precious months and allowed the build to be achieved during the excellent weather of 2018 rather than be delayed until the end of the bat season in the late summer of 2018.

The Company utilises the BCT Bat Survey Guidelines but the circumstances generated by the fact that the building was effectively a shell combined with the power of the DNA analysis allowed us to conclude that a precautionary Method Statement approach would assure the protection of species as well as deliver a favourable client outcome.

A combination of mitigation and compensation measures have allowed the provision of bat features for a range of island species; including the formation of a dedicated bat space in the adjoining pigsty that will be suitable for species such as the free-flying long-eared bats as well as the smaller roost crawling species.

Efforts to encourage the nesting of the kestrel Falco tinnunculus which was known to have previously nested within the building already appear to be showing signs of success. Well thought out building design with ecological advice can generate a huge amount of opportunity for the promotion of island biodiversity.

If you need a bat survey, ecology survey, tree survey or any of our other services carried out in Guernsey, Jersey or the Isle of Man please contact us for a free quote and a chat about your project. You can also read about our services in the Crown Dependencies.

Customer Feedback

Preliminary Ecological Appraisal / Phase 1 Habitat Survey

THe PEA and PRA were undertaken promptly although it would have been helpful to have been advised that there was a risk that further bat survey work may not be possible due to limitations on staff resources.

4 stars
Bat Risk Assessment

Natalie and her team were super and all clearly passionate about their work. Natalie was extremely friendly, helpful and communicative prior to the surveys commencing and happy to explain the process to me whilst the surveys were taking place. Natalie's report arrived promptly after the...

5 stars
Bat Risk Assessment

Knowing nothing about this ecological surveys, Louise took the time to explain all to me clearly, and helped with bat regional survey request form. Many thanks, David

5 stars

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