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Woodland Survey Results

The NBMP Woodland Survey was piloted by BCT in 2004 and rolled out in 2005 as a new method to assess the presence and relative abundance of barbastelle (Barbastella barbastellus). The survey and analysis methods were revised in 2006 and surveys have been completed using this revised methodology since then.

The surveys are completed in three periods as follows:

  • Period 1: 25th July to 8th August
  • Period 2: 9th to 23rd August
  • Period 3: 24th August to 7th September

Currently Natural England provide funding to monitor the presence of barbastelles using this survey methodology at five woodland Special Areas of Conservation (SACs) in England where the presence of barbastelle is a primary reason or qualifying feature for designation. An additional site is surveyed in Wales. The results across all survey years are summarised in the table below.

Summary of Woodland Survey results 2005-2016 (N/S = not surveyed)

SAC site County Barbastelle recorded
2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
Briddlesford Copses Isle of Wight  N/S N/S   N/S  N/S Y Y N/S   N/S N/S   N/S  N/S N/S 
Ebernoe Common West Sussex  N/S N/S  N/S  N/S  Y Y Y Y Y Y Y Y
Eversden and Wimpole Woodlands Cambridgeshire Y Y Y Y Y Y Y Y Y Y Y Y
Exmoor & Quantock Oakwoods Somerset  N/S  N/S N/S  N/S  Y Y Y Y Y Y Y Y
The Mens West Sussex N/S  N/S  N/S  N/S  N/S  Y Y Y Y Y Y Y
Mottisfont Bats Hampshire Y Y Y Y Y Y Y Y Y Y Y Y
North Pembrokeshire Woodlands/ Coedydd Gogledd Sir Benfro Pembrokeshire Y  N/S  N/S N/S  Y Y Y  N/S Y Y Y Y

Since 2005 a total of 49 transects have been surveyed. This includes transects in seven Special Areas of Conservation. From 2011 surveys have been primarily been focused on the SAC sites. The map below shows the distribution of all Woodland Survey sites and confirmed barbastelle records from 2005-2016.

Distribution of Woodland Survey sites 2006-2016

Woodland Survey sites 2005-2016

 

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