Large hoverfly sitting at 3,000ft on stones mixed with heather and crowberry. Making an odd droning sound, like a persistent whine. No explanation for this?
No interactions present.
The noise is vibrating wings - presumably to maintain body temperature at this altitude.
Lat/Lng: 56.65, -3.32
OS grid ref: NO191516
3,000ft above sea level with adjacent heather and crowberry cover.