The cache is not at the posted coordinates. This Wherigo cache is part of the Florida Finders Fest 2018 Butterfly geo-art. See below, to determine where the cache is.

Fast in flight, Horace's Duskywing is a difficult butterfly to identify quickly. Careful examination of wing pattern, color and season of activity are needed to differentiate it from Juvenal's Duskywing. Even then, it can be complicated.
Males sit on plants that are low to the ground and scout for females. Mating typically happens at mid-day. Females lay fertilized eggs on young branches of oak trees. Caterpillars feed on the leaves of a variety of oak tree species. In warmer areas, two generations are produced with late-season caterpillars overwintering. Adults visit flowers from goldenrod, peppermint, dogbane and winter cress. They enjoy sunbathing in open areas. Look for them in oak forests, open fields, roadsides, meadows and gardens in the summer.
Play the simple Wherigo cartridge found at the link below, to determine where the final is! It is a Play Anywhere style cartridge, and, due to poor reception in the ONF, we suggest playing these from the comfort of your homes.
***Wherigo Link***