These flies like just sitting on my fence all day
No identification made yet.
No interactions present.
They do this to keep warm. The microclimate in the few millimetres of air next to an object in a sheltered position in the sun can be significantly hotter than the surroundings. This keeps the flight muscles warm and allows the fly to take off in a fraction of a second. It also allows it to be active during cooler weather.
Lat/Lng: 51.216653057964, -1.4640151259664
OS grid ref: SU375465