Lack of monitoring impairs bat conservation research

Millions of pounds are being spent to protect bats from disturbance by building development and renovations, however a lack of follow-up monitoring makes it difficult to tell whether conservation efforts are effective. Researchers from the University of Bristol Mammal Research Unit found that between 2003 and 2005 an estimated £4.3 million was spent by developers in England to provide new homes for displaced bats, but less than 20 per cent of sites were monitored afterwards for their impact on bat populations. Dr Emma Stone , lead author of the study, said: "Despite the licensing process and the millions spent on it each year, we are still unable to assess the impacts of the mitigation and development on bat populations." All UK bat species are endangered and are protected by the European Union Habitats Directive. It is illegal to damage a bat roost or disturb, capture or injure a bat. However developers who wish to modify a building containing bats can apply to Natural England for a license that permits necessary disturbance, providing that they take measures to maintain the local bat population. The license holder must provide new roosting areas for bats displaced by building developments, such as bat boxes and bat lofts. These are assumed to be 100 per cent successful by Natural England.