I have no idea what that is, but it does make for a nice contrast in colours
Very nice. It looks like sap or oil.
I have no idea either, Brian, but it's a very nice capture.
Sergio
Is that dripped from a tree above?
Probably it is some kind of resins some trees secrete; when it fell on the leaf it started solidifying along with falling down slowly under gravity....than it solidified, leaving behind a thin film that remained stuck on the leaf. Later the thin film cracked leaving some residue there (above) and the remaining part of the thin film remains as a collar...this is what i feel