Redefining Biodiversity

Little light between grey land and sky this morning:

And this was reflected in the lack of birds. 220 Fieldfare, 6 Cormorants and 11 Golden Plover, all passing over, were the only species of note. Depressingly, the stubble field has been ploughed and planted with winter wheat, meaning in no finches or buntings were seen at all. This, combined with the lack of winter floods, has produced large areas of sterile birdless farmland with a very low biodiversity index (as we say these days). Perhaps this will one day read that the area scored lowly on the Cuddesdon Index of Zero Biodiversity, where 0 = no birds and 10 = a Chaffinch?