England Otter Survey Database
As part of a scheme to monitor the distribution of otters throughout the UK, four England otter survey have been carried out covering the years 1977-79, 1984-85 and 1991-94, and 2000-02. In the first national survey, alternate 50-km squares - the north-west and the south-east quarters of each 100-km square - of the National Grid were surveyed to geographically represent cover of all regions (giving a total of 2940 in the first survey). The second survey (funded by The Vincent Wildlife Trust) in 1984-86 added four more 50-km squares (that were deemed unlikely to have otters in the first survey) giving a total of 3189 sites, all of which were re-surveyed in 1991-94 (The Vincent Wildlife Trust). In the 2000-02 (The Environment Agency) surveyed all alternate 50-km squares in England were surveyed, making the total of 38 50-km (and partial) squares and 3327 sites. Sites were selected by accessibility and likelihood of finding signs of otter activity - typically road bridges and the confluences of watercourses. The number of sites visited per square varied. The survey protocol was to search up to 600m of one bank of a water body from a starting point (grid referenced), either all in one direction or split between two directions. Searching stopped as soon as signs of activity were noted in the 1977-79 and 2000-02 surveys, the full 600m being surveyed in the intervening surveys. The number of spraints and presence of mink was also recorded.
Joint Nature Conservation Committee ([Insert download year]). England Otter Survey Database. Occurrence dataset on the NBN Atlas
Looking up... the number of records that can be accessed through the NBN Atlas. This resource was last checked for updated data on 07 Feb 2023. The most recent data was published on 07 Feb 2023.Click to view records for the England Otter Survey Database resource.