Farmland bird species continue to decline Woodland birds stable

Is this counting wrong species or are the broad and shallow environmental schemes ELS and CFE , based on assumption not science , really just not effective  and targeted work like HLS  be a better spend .The birds might benefit from less politics and vested interest dogma

http://www.defra.gov.uk/evidence/statistics/environment/wildlife/download/pdf/110120-stats-wild-bird-populations-eng.pdf