Juvenile female leaf-mimicking katydid (Tettigoniidae). Females have the large, sword-like, ovipositor at the end of their abdomen, and adults have full wings that cover the entire body.
I also ran into this, which I took in another part of Costa Rica a few years ago.
Found another katydid (Tettigoniidae) with spermatophores/nuptial gifts present, as I mentioned observing here!
The little white bubbles at the tip of this female’s abdomen (about halfway down the length of the wings; there are two, but only one is visible on this shot), can contain various amounts carbohydrates and proteins as a gift from a mate along with sperm.
