We make a recording of all the calls we hear on a survey,as even with a number of pair of ears things get missed. So it can be fun when the calls are analysed The human ears didn’t pick up the all barbastelles because of loud pipistrelles which drowned them out
Better still the static recorder at the Gatehouse on closer analysis showed a serotine and what was almost certainly a Leisler’s.(a rarely heard bat in Beds)
All the maps are QGIS Map produced using QGIS 2.10.1 – Pisa. Contains public sector information licensed under the Open Government Licence v3.0. http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/