Status
  • Scarce - Species that are scarce for the county
  • Description (EBSIP) - Species that are extremely rare for the county and for which a full description is required by the Essex Birdwatching Society Identification Panel
  • Description (BBRC) - Species of national significance for which a full description is required by the British Birds Rarities Committee
Category
  • Category A - Species recorded in an apparently natural state since at least 1st Jan 1950
  • Category B - Species recorded in an apparently natural state at least once between 1st Jan 1800 and 31st Dec 1949 but not subsequent to that
  • Category C - Species that, although introduced, now derive from the resulting self-sustaining populations
  • Category D - Species that would otherwise appear in Category A except that there is reasonable doubt that they have ever occurred in a natural state. These do not form part of the British List.
  • Category E - Species recorded as introductions, human assisted transportees or escapees from captivity, and whose breeding populations (if any) are thought not to be self-sustaining. These do not form part of the British List (unless they are included in Categories A, B or C)
  • Category F - Records of Bird species recorded before 1800.