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National Bat Monitoring Programme Annual Report 2015

The National Bat Monitoring Programme (NBMP) is an annual series of bat surveys undertaken by thousands of dedicated volunteers, which allow us to monitor changes in British bat populations. The data we collect are used by the Government and conservation organisations to monitor the health of our environment, inform policy and improve the conservation of bats.

This report provides population trends for 11 of Great Britain's 17 resident bat species derived from data collected up to and including summer 2015. Trends are provided at GB-level and also at country-level where sufficient data are available (for England, Scotland and Wales; we have insufficient data to provide trends for Northern Ireland at present). This report also provides information on our survey methods and the factors that are driving changes in bat populations in the UK.
Brown long-eared bat (Hugh Clark)

Key sections of the report:

Contents page

Summary of findings


Species Populations Trends


Official Statistics: These statistics have been produced to the high professional standards set out in the Code of Practice for Official Statistics.

This report was compiled by Katherine Boughey, Philip Briggs and Becky Wilson. Statistical analysis was completed by Steve Langton.

The report should be cited as: Bat Conservation Trust, 2016. The National Bat Monitoring Programme. Annual Report 2015. Bat Conservation Trust, London. Available at

The National Bat Monitoring Programme is run by the Bat Conservation Trust, in partnership with the Joint Nature Conservation Committee, and supported and steered by Natural EnglandNatural Resources WalesNorthern Ireland Environment Agency, and Scottish Natural Heritage. The NBMP is indebted to all volunteers who contribute data to the programme.

Bat Conservation Ireland contributes Northern Ireland bat records collated by the Irish Bat Monitoring Programme which is funded by the National Parks and Wildlife Service of the Department of Arts, Heritage and the Gaeltacht, Republic of Ireland and Northern Ireland Environment Agency. Data are shared on the NBN Gateway.

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