At first, I was thinking "how can you take a pic of a mesh of branches and expect us to pick out a number" Then looking a bit, trying to find an obvious one, that 15 jumped right out at me. absolutely amazing! I wonder how this would look if you cropped it to the bottom of the horizontal branch that the 15 is sitting on. It might help to draw our eyes right to the 15 rather than trying to search for it. Not like it's not obvious, lol, I think I'm having a dumb moment. focus and clarity are good, as is lighting conditions. Great find!! Good luck in the challenge.
as far as tree numbers go, yours is probably my favorite because i didn't find any "5"'s in trees (i saw an awful lot of 7's and 1's and 8's) and because i like the way that the background doesn't interfere with the form of the number. i do think that i would have liked it even better had you cropped in a bit closer.
Uhmm... Yes. But even with the best of imaginations, I cannot really see any very clear number here. Sorry. Great image otherwise though> intriguing shape and cool exposure. Nice sky as well. (4)