- Licensed surveyors
- Competitive pricing
- Pragmatic solutions
Our ecologists are fully licensed to undertake your bat survey.
Preliminary Roost Assessments
A daytime inspection of a building, structure, tree or habitat to look for evidence of bats and assess the potential for bats.
Emergence / Re-entry Surveys
A dusk or dawn survey looking for bats entering or leaving roosts. Usually required if the preliminary roost assessment identified potential for bats.
A dusk or dawn survey observing all bat activity on a site. Often required if the preliminary assessment identified good habitat for bats.
We can apply for a European Protected Species (EPS) mitigation licence for you.
* Excluding VAT. Guideline prices are for a small, local site. Actual costs are based on various factors including site size and travel distance, get a free quote.
Not sure exactly what you require? Our experienced ecologists will provide free, no obligation advice, just ask.
Preliminary roost assessment (buildings)
Preliminary roost assessment (trees)
Dusk emergence, dawn re-entry and activity transect surveys
Why bat surveys are needed
All UK bat species are European Protected Species and are legally protected. The bats themselves, their habitats and where they live (their roosts) are all protected.
If your proposed works could injure or kill a bat, or damage their habitat or roost you may be in breach of the legislation. Therefore, if the works are likely to impact upon a potential roost (e.g. building, structure or tree) or suitable habitat (e.g. woodland, scrub, hedgerows) bat surveys may be required to ensure that the law is not broken and inform a successful planning application.
The survey process
Bat surveys are usually a two stage process. There is an initial preliminary assessment, followed by further detailed bat surveys if the initial assessment finds bats or potential for bats.
This involves a daytime inspection of a building, structure, tree or habitat to look for evidence of bats and assess the potential for bats to roost, forage or commute. This can be undertaken at any time of the year.
Dusk emergence and dawn re-entry surveys
If the preliminary roost assessment finds potential for bats or evidence of bats roosting in a building, structure or tree then further surveys are usually required to look for bats leaving or entering the roost. These surveys are undertaken at dusk and dawn and involve surveyors watching potential access points. These can only be carried out between April and October and need to be spread across the survey season.
Activity transect surveys
If the habitat on a site is assessed to have potential for bats during the preliminary assessment or a Preliminary Ecological Appraisal then further surveys may be needed to discover if and how bats use a site. This involves a surveyor walking a transect around a site at dusk or dawn and recording all bat activity. Static bat detectors are also left out for several nights at different locations around a site to find out which areas are most important for bats, and how many and what species of bats are present. Activity transects can only be undertaken between April and October and need to be spread across the survey season.
The next steps
If surveys find that bats are present we will work closely with you to design practical mitigation to ensure your project complies with wildlife law and that your planning application is successful.
Mitigation is dependent on the species and number of bats present. It may simply be installing bat access tiles or it could be more complex, for example creating a roof space for bats. We will always advise on the most suitable mitigation necessary.
European Protected Species (EPS) licence
If impacts to bats cannot be completely avoided it may be necessary to apply for a EPS mitigation licence from the relevant Statutory Nature Conservation Organisation (Natural England, Natural Resources Wales, Scottish Natural Heritage). These licences permit works affecting bats that would otherwise be illegal, and can be applied for after planning permission has been granted. We are experienced in preparing and applying for these licences.