Now handed in at Llandudno police station, though I wouldn't hold any hope of them finding it if you go looking - they didn't take ANY details whatsoever, and didn't even want to ask where I had found it!
Bit late now, I guess, but the scree descent involves following the West Face descent path (head north for a short distance from the summit as if heading for the North Ridge, then cross some small slippy slabs and follow the path down Westwards), and then turning right when you get onto the flatter ground at the bottom of the scrambly section of the West Face descent path, instead of following the worn path that heads off towards Ogwen.
The scree in places is quite unstable, like the Bristly scree descent, and can be a killer on the knees/thighs at that stage of the day, but is a faster and more direct route to the road (it's the one the fell runners use), and especially if you intend taking the East ridge up Pen yr Ole Wen (i.e. passing round the E end of Llyn Ogwen at Glan Dena) rather than the South ridge ascent (passing Ogwen cottage at the west end of the lake).
Golden Plover do like heathery areas - particularly with peat 'Hags' and patches of bog - for feeding, but for breeding they like flattened hillock tops with short grass for unobstructed views of the approaching Hen Harriers...... Sadly, any views of Hen Harriers are no longer such an issue in England
The problem is that although the current environment is not the original one, it is still important as it is now - the Blanket Bogs and Semi-improved grasslands of upand Snowdonia / Lakes are very important habitats in their own right and reforestation could lead to local / national extinction of many threatened species.
I spent several days this summer out surveying the Migneint for Golden Plover. Sadly I didn't find any, and part of the reason is that a lot of Plover habitat has been lost through UNDER grazing of the area - what were once close cropped grassy hillocks are now covered with rough heather scrub and the Plovers need to have the open summits for nesting on in order to keep watch for predators.