Dancing Capercaillie bird makes a tentative comeback in Scotland

Exclusive: Ecologists say there are early signs that the population is recovering in remote forests

It is a discotheque for Britain's biggest type of grouse. Before dawn, male capercaillie will begin their courtship rituals, their black tail feathers erect and fanning out, chests puffed out, their heads thrust high into the cold spring air.

Their dancefloors are forest clearings in the Highlands which echo the males' wheezing, popping and clattering mating calls. Often perched in surrounding pine trees, hens will carefully watch as their potential mates compete to win their affection.