The Sunday Post revealed that the populations of some birds, such as the yellowhammer and corn bunting
, will never fully recover as modern agricultural techniques have turned their habitats into a "chemical desert".
Birdwatchers favour prime or zoom telephoto lenses to seek out elusive species such as the corncrake or corn bunting
, which remain well camouflaged until the crops are harvested in September.
These include grey partridge, turtle dove and corn bunting
, all of which have declined by more than 50%.
But Mr Hirst warned the study does not show the declining number of at-risk birds like the corn bunting
Figures published by the Government show a 14 per cent drop in farmland bird populations, with corn bunting
and grey partridge doing poorly.
Migratory birds wintering in sub-Saharan Africa and farmland birds such as the Corn Bunting
(Miliaria calandra) have also declined in numbers.
"Species such as the Corn Bunting
, once common along our coast, have become rare as they need winter stubble to thrive.
Guided tours detail the organic cereal grains grown in the fields around Bowhouse Farm.The RSPB leads tours of the estate to spot local wildlife, including the endangered corn bunting
A Mid Scotland and Fife MSP is the new Scottish Environment Link species champion for the corn bunting
Roedd sawl un o'r rhywogaethau dan sylw fel y gornchwiglen, y gylfinir a bras yr yd (Emberiza calandra; corn bunting
) wedi elwa o'r cynefinoedd hynny.
On Bardsey a corn bunting
was noted, this species being desperately rare in Wales.
The last Irish countryside bird to go extinct was the corn bunting
in the 1980s.