Intensive grazing and frequent mowing of grassland on dairy farms has hit populations of birds like the turtle dove, grey partridge and corn bunting.

BBC: The grey partidge is nearly extinct in parts of England

The RSPB says the grey partridge and corn bunting are all but extinct in parts of the South West, West Midlands and North West, while turtle doves are disappearing from south-western England and Wales.

BBC: The grey partidge is nearly extinct in parts of England