Courts are increasingly reviewing detailed plans with regard to bats in Swedish municipalities. When decisions are appealed and the process is prolonged, financing and other aspects of project planning can be negatively affected. Early mapping of the presence of bats in the planning area minimizes the risk of legal setbacks and creates a better basis for decision-makers.
In several rulings from the Land and Environment Court that Ecogain has analyzed, the court states that the evidence regarding bats is insufficient to assess permissibility. The greatest opportunity to influence the schedule is at the beginning of a large project, and a preliminary study on bats can be a good way to proceed.
"We offer thorough preliminary studies for bats when it comes to assessing species protection under the Environmental Code and suitable locations," says Ambjörn Johansson, consultant and bat investigator at Ecogain.
Bat study – for a clear way forward
To reduce the risks associated with, for example, large investments in projects that may encounter obstacles related to species protection and stop risks, Ecogain has developed a service we call a bat feasibility study.
The preliminary study is based on analyses of existing species values from ArtDatabanken, together with data on natural geographical conditions and other sources relevant to bats. A weighted analysis of the collected data forms the basis for an assessment of an area's suitability in terms of breeding environments and resting places, both of which are covered by the Species Protection Ordinance.
The right decision requires good knowledge
"Bats can be found in unexpected places, which can surprise even municipalities and county administrative boards, posing a risk," says Ambjörn Johansson at Ecogain.
One advantage of a preliminary study is that it does not require any fieldwork and can be carried out at any time of the year. Since the field season is very short, it is important to know well in advance whether an inventory is needed.
“The preliminary study saves both time and money, and it gives the customer clear information about how consideration for bats can affect the planning of a project,” continues Ambjörn Johansson at Ecogain.

The preliminary study cannot replace a field inventory, but it does provide an early indication of possible risks. In assessments, risks are classified in a visual and easy-to-understand manner based on their level of risk. Developers gain a clear picture of the project's suitability and potential challenges, as well as whether anything needs to be adjusted or reevaluated with regard to biodiversity.
Why order a bat survey?
- Fast and cost-effective: The preliminary study is delivered 2–3 weeks after ordering and is based on existing data. The process does not require resource-intensive fieldwork, which saves both time and money.
- Clear basis for decision-making:You receive structured documentation that strengthens your planning and creates better conditions for the next phase.
- Minimizes risks: The bat study provides a clear picture of potential risks in the project that could cause delays or stoppages in the process.
- More efficient project process: Prioritizing bat conservation early on and identifying potential obstacles creates better conditions for finding solutions and moving the project forward.