A systematic approach to estimate the distribution and total abundance of British mammals

1. To mitigate the attitudes of a minority of local data providers occurrence records must be submitted to national surveys such as the Mammal Society’s Mammal Tracker. 2. Studies are required to estimate density for common species and in areas of low or no abundance. 3. To ensure such studies can be collated and used efficiently we propose a standardised approach reporting density estimates based on the 1km resolution British National Grid, or habitat representative of the 1km square, with digital maps to accompany publications.