Revive, which includes the League Against Cruel Sports, is pressurising Scottish ministers over traditional practices such as burning heather and culling predators, claiming they are causing huge environmental damage.
Although it denies wanting an outright ban on grouse moors, Max Wiszniewski, its campaign manager, has said the industry may not “survive” the “necessary” reforms.
Scottish Natural Heritage (SNH), a government agency, states on its website that muirburn provides grouse with ” short fresh growth and longer heather nearby in which to shelter.”
It also states that “variation in vegetation structure also suits deer and livestock”, while “birds, insects and reptiles, can also benefit from appropriate, well-managed muirburn.”
Revive said its footage in the Cairngorms shows moorland with a high peat density “quite literally on fire” and this was “all for the single purpose of protecting grouse which will subsequently be shot for entertainment.”
Mr Wiszniewski said: “I’m sure the public will be shocked to see the damage which is deliberately inflicted on our uplands to create a habitat suitable for one species to the detriment of our environment and wildlife.”