Not as colorful as other butterflies but still an important part of the ecology of our planet where there are more insects than all other animals and people combined and the rest of the earth depends on them! 🙂 Plain Longtail Skipper, Urbanus simplicius. And for you who are identifiers, let me add that I had some trouble identifying this one, with the side view, to me, being more like the Teleus Longtail but I think the fainter white lines on the tops of the wings is what makes this one a “Plain Longtail,” along with the location of the white on his antennae. Here’s 4 shots from different views . . .
See also my Plain Longtail Gallery for more of this common Skipper in my garden and at other places in Costa Rica.