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.
The Mimosa Yellow closely resembles the Barred Yellow Sulphur, which lacks dark dots that the Mimosa Yellow has. It also looks like the Little Yellow Sulphur, which has a pair of black dots at the base of its hindwing as well as near the tip. Mistaking it for one of these isn't unusual. Shades of light pink may be visible on the hindwings.
The Mimosa Yellow Sulphur's range is rather small and it rarely strays from it. They can be found in forests as opposed to open fields and meadows like other butterflies. Thanks to the warm weather, it can produce up to 4 generations in one year. The larvae feed on mimosa plants.
Wherigo Link