No interactions present.
The SFF subterminal line does curve towards the wing tip whereas the FF doesn't.
As I understand it
The FF has a bottom line curving toward the wing margin
The Small FF has a straighter line
THe description is a bit ambiguous
Whats Happening with Nature ??? Visit the Nature Blog
Supporting FEET Conservation work & Biodiversity Recording
Both have curved sub-terminal lines, but in Small Fan-foot the lines reach the apex of the wing, and in the Fan-foot it does not.
Lat/Lng: 51.3, -3.3
OS grid ref: ST1067