Bat forensic surveys take into consideration the structure of the building and its
potential to be able to house a bat roosting site. The survey also looks for signs
of use of the structure by bats.
Bats are small secretive animals, their apparent size when flying is misleading of
their actual body size once their wings are folded. This small body size means that
it is easy for a bat to hide in a structure and never be seen. Since they don’t
gnaw or build nests and leave few signs it is normal for owners and developers to
assume they are not there particularly given their nocturnal and silent habits. Because
of its nature this part of the survey can be undertaken throughout the year. This
can be important if it is necessary to register the planning application during the
winter months when it is not possible to perform the entire survey.
What is a Forensic Survey
In conducting the survey we look carefully at the structure of the building and for
the few signs that bats leave behind. We also examine likely hiding places using
endoscope, fibre and video probes. For difficult cavities our 2 metre long 6 mm diameter
video scope with its joy stick controlled 360 degree rotatable and flexible tip provided
definitive presence or absence results. The results of where signs of bats or bats
themselves are found are mapped.