Establishing if a tree is being used as a bat roost can be accomplished using standard
bat flight surveys but this can be difficult and may leave a time gap between survey
and tree works during which bats may move into the tree. This may still leave the
owner and tree surgeon open to prosecution under the law.
However, to supplement the standard flight survey it is more cost effective to use
one of our specially developed methods.
Working in conjunction with one of our specially trained tree climbers we use small
wireless and cabled cameras that the climber is able to manipulate to fully explore
cracks and cavities in the tree. Our fully licence bat operator is able to see the
images from ground level and direct the climber to spot any bats or signs of them.
For health and safety reasons much tree work is now performed from all terrain powered
access equipment. If this equipment is available on site then it gives us the opportunity
to mount one of our endoscopic video probes on the basket of the machine. This allows
us to reach up to 2 metres inside a cavity. Our probes have flexible remote control
tips which range in size from 6 mm in diameter upwards. With the combination of length,
diameter and flexibility we are able to fully explore cavities for potential roost
These techniques give security against the potential of prosecution by ensuring bats
and bat roosts are not damaged in the course of tree work and if needed an appropriate
licence can be applied for. See Natural England Licence Applications