Realm: Terrestrial
Climate: Temperate
Biome: Temperate broadleaf and mixed forests
Central latitude: 53.484610
Central longitude: -3.274640
Duration: 23 years, from 1993 to 2015
8027 records
15 distinct species
Across the time series
Pipistrellus is the most frequently occurring species
Methods
One or more kilometre squares are selected at the site. The selection need not be at random, and a square which is reasonably typical of the ECN site should be used. Selection should be based on the practicality of safely walking along a transect which crosses the square in darkness.The transect is likely to follow linear features and boundaries between habitat types. Having selected the transect, any linear habitat features from the list provided (see page 183) are marked on the map, as are other habitats occurring within about 20 m on either side of the transect/linear feature being followed. If walking through a uniform habitat, simply record the same habitat feature on both sides of the transect. The habitat features are recorded on a separate 1:10 000 map using coloured crayons, and identified with the habitat code numbers given on page 183. They should be updated annually.The transect should be walked four times in each year. The Batbox III tunable bat detector is recommended for use during the survey. If the observer is inexperienced, the output from the detector should be connected to a tape recorder so that identification can be improved and confirmed by comparison with a tape of bat calls which is available commercially. The detector should be tuned to 45 kHz and left on this frequency, as this will pick up the largest range of bats. The frequency should not be changed during the walk. A separate copy of the map should be used for each evening walk, even if no bats have been recorded on previous occasions. When a bat is seen or heard, the appropriate symbol (see Chapter 3, page 182) is recorded on the map and the walk continues immediately, with no pause to listen for bats. A circle is drawn on the map where each bat is detected. If the species can be identified with certainty to one of the groups listed, the appropriate letter code is added to the left. If a feeding buzz is heard, add a letter 'f' on the right of the circle, and if it is heard echo-locating but a feeding buzz was not recorded, add a letter 'h'; there may be instances in which both suffixes are attached. Bats which are seen, but not heard on the bat detector, should be recorded with a circle and a letter 's' to the right.
Citation(s)