18 Close Encounters of the Mammalian Kind If you have encountered any of our wild mammals in Essex can you let me know so that I can add your observations to the Essex Field Club mammal records? You may, in addition, be assisting in various national surveys as many records are forwarded to organisations who are compiling information for countrywide surveys, including, for example, the national small mammal survey, water vole survey and badger survey. Ideally, records should include species, date of observation, location and, where possible a 6 figure grid reference and any habitat or relevant ecological data.