One website calls this “Blurry-Striped Longtail,” but I think I prefer White-striped Longtail, Chioides catillus (my gallery link). Just this one shot here plus the feature photo at top. Go to that gallery for more shots in my garden the other day while still windy + more from last year.
¡Pura Vida!
And for you butterfly aficionados, yes, he is a lot like the Durantes Longtail, but without that white stripe! Plus he has a longer tail than any of the other Longtails, I think.