Bat Survey, Dorset: Protected Species Surveys

What is a Bat Survey? 

Bat activity surveys may be required for some developments to assist with planning applications during the planning permission process to find out whether the planned development passes could impact bats in the area. Typically, the local planning authority, registered in England, will let you know about the bat survey requirements. The need for bat surveys could also be identified during a PEA survey

Bat ecology surveys detect when a bat is present or the presence likely absence of bats within the development area so that the planning and development process can proceed. If the survey finds that there is evidence of bats in close proximity to a site, bat mitigation and compensation measures must be undertaken before any development work is permitted to proceed. 

These measures are required as bats, and bat roosts within trees, are protected species under the Wildlife and countryside Act, and they are also a European protected species. Therefore, it is illegal to kill, harm or disturb bats in any way.

Bat survey Dorset

Bat Survey, Dorset: Bat Activity


The active season for bats in Dorset is at its peak during the summer months. Therefore, this is the best time of year to carry out survey work to determine the presence of roosting bats.

The many species of bat based in Dorset are Long eared bats, Common Pipistrelle bats, Natterer’s bats, Daubenton’s bats, Whiskered and Brandt’s bats.

Types of Bat Survey, Dorset

There are two types of bat surveys which can help you to discover which bat species present. The first is a preliminary roost assessment which involves an Ecology Consultant carrying out a site visit. They will carry out both an internal and external inspection of the building, looking for evidence of roosting bats, including insect feeding remains as well as bat droppings.

The second type are nocturnal bat emergence surveys involve surveyors using bat detectors to record and analyse bat calls. These surveyors will operate either when bats are leaving their roosts to forage (dusk emergence surveys) or when the bats return to their roosts (emergence and re-entry surveys) to determine the number of bats.

How Can Collington Winter Assist?

Collington Winter Environmental, we are an experienced team of ecological consultants with extensive knowledge in undertaking bat and hibernating bat surveys using good practice guidelines. Our Ecology Director, Olivia Collington, who has worked with protected species throughout the UK, holds a Natural England bat survey class licence and bat licence.

Please contact our Ecology Director Olivia Collington via email ( for information on cost bat protected species surveys, such as bats and great crested newts. We also provide ecological appraisal and assessment services.

Contact Us

Registered Address

23 Bark Street East 

1st Floor




Bolton Office: 01204 939 608

Dumfries Office: 01387 378208