In woodland, foraging in a distinct trail along fallen branches etc.
No interactions present.
The feature that does it is neither size nor colour but the concave back to the head. Only Formica exsecta (red and black) shares that.
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
Lat/Lng: 51.3616, -2.393
OS grid ref: ST727625