@gembo: "That is grouse moor for certain."
While taking a walk over Hare Hill earlier this year (looking for the Ju88 crash memorial) we noticed a fair number of obviously pretty new grouse butts on the southern slopes of the hill. Someone put some money in to building those.
I can imagine that someone who has just 'invested' a chunk of cash in a bird killing theme park might find themselves tempted to 'protect' that investment with a bit of illegal wildlife persecution. Any enterprise which relies on criminal acts in order to make money isn't a business: it's a racket (aka "organised crime", even?) People who make a living by breaking the law are criminals. Aren't they?
There are grouse butts on Black Hill, Hare Hill, Carnethy Hill, South Back Hill and a number of other sites within the regional park. I've no idea how much use is actually made of them: I'm not aware of ever having been warned off any part of the park because shooting is going on.
"...the location is not green cleuch. Green cleuch is north and east around Black Hill from the spot indicated. Looks more like Loganlea end of Black Hill."
The location marked by the red star on the map in the article linked by IWRATS is marked as Green Cleuch on the OS 1:25,000 map, and on the map in the Pentland Hills Regional Park visitor guide. That location is also referred to as Green Cleuch in Susan Falconer's Walking in the Pentland Hills Cicerone guide. Even openstreetmap calls it Green Cleuch. (AFAICS the valley at the north-east end of Black Hill is Den's Cleuch.)
The OS map seems to be quite clear that Green Cleuch runs south-east from the red star (grid reference approximately NT179624), towards the Logan Burn waterfalls.
I would agree that the photo seems to show one of the bridges nearer the SE end of the Cleuch, though I'm not sure which one (we've not been back that way since our hike over Hare Hill).
The aerial photo seems to have been taken from somewhere above Loganlea reservoir, looking WSW and showing at the left of centre where the SE end of Green Cleuch opens out and turns ENE towards the reservoir.
All of which is by-the-by and peripheral to the actual issue of the ongoing persecution of wild birds within our regional park, and the authorities' apparent inability or lack of willing to take effective action against it. Don't we have vicarious liability on Scotland for persecution offences these days?
I wasn't aware that a raven's nest had been attacked but I had noticed that there seemed to be far fewer of those fantastic birds about this year. People who do this sort of thing really are scumbags.