Black grouse are said to be in serious decline

Cairngorms National Park Authority (CNPA), which organised the course, said the birds' numbers have been in steep decline for the past 40 years.

It said climate change was one of the reasons for a UK-wide fall of 90% in its population.

The training was led by Dr Mark O'Brien, RSPB Scotland's black grouse expert.

CNPA said it was first time such a course has been held.

Dr O'Brien gave talks on the birds' status and distribution. There was also advice on managing moor, wood, farm and wet lands.

The group also visited Glen Livet Estate to be shown black grouse conservation methods in practice.

Kate Christie, of CNPA, said it was one of a series of courses.

She said: "Other courses that are coming up include a course on lapwing, woodland grazing, habitat monitoring and the grazing impact of deer."