NBMP/MTUK Bats & Roadside Mammals Su…

Occurrence dataset published by Bat Conservation Trust

  • 16,098

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Full Title

NBMP/MTUK Bats & Roadside Mammals Survey


The distribution of bats and other mammals along roads in selected areas of England, Wales and Scotland.


The project was a joint initiative between the Bat Conservation Trust (BCT) and the Mammals Trust UK (MTUK). The dataset was created to increase the number of bat and other mammal records along roads,

Additional Information

More information can be obtained from the yearly survey reports available for download from http://www.bats.org.uk/nbmp.

Temporal coverages

Date range: May 2, 2005 - Sep 28, 2008

Language of Metadata


Language of Data


The Bat Conservation Trust
Metadata author
The Bat Conservation Trust
Administrative contact
The Bat Conservation Trust Admininistrator


Published by

Bat Conservation Trust

Publication Date

Mar 21, 2016

Registration Date

Sep 15, 2010

Hosted by

National Biodiversity Network

Served by

NBN Atlas

External Data

Metadata Documents

16,098 Georeferenced data

View records

All records | In viewable area


The distribution of records is biased toward those groups who were able to participate in the survey: 2005: Avon, Cardiff & the Vale of Glamorgan, Central Scotland, Clyde, Dorset, Hampshire, Isle of W… more


What does this map show?


Quality control

Surveys were carried out within selected 15km square survey blocks in different counties in Britain. The survey routes were selected by participating volunteers. Bat echolocation calls were analysed by a volunteers, approximately 50% of which were trained by the project coordinator. The remainder were already experienced in sonogram analysis. Some of the records of rarer species were checked by the project coordinator. The dataset has been checked using NBN Record Cleaner.

Method Steps

  1. Time expansion (x10) bat detectors were attached to the rear passenger window of a car moving at 15 mph. The detector was set to sample 320ms of ultrasound every 3.52s. 25-30 mile routes were driven from May to September in 2005 and 2006. Survey routes were selected within pre-defined 15 km squares survey blocks. Surveys began 45 minutes after sunset. Bat calls were analysed by volunteers with some cross-validation or checking of records taking place by the project coordinator. Other visually observed mammals were recorded along the transects.