Same species as UK Holly Blue but photographed in Maine
No interactions present.
I'm no expert on American butterflies, but there seems to be some confusion (at least on the web!) about which species name goes with "Spring Azure", and indeed how many species are involved in this group. Your photo looks to me like photos labelled "Celastrina ladon" on various US websites, rather than Celastrina argiolus (although both of these species names seem to have been linked to the English name Spring Azure).
But according to Wikipedia. C. ladon may in fact be a subspecies of C. argiolus anyway!:
Whatever the name should be, it does look a rather different butterfly to the UK Holly Blue version of this species.
Entomologist and biological recorder
I agree, Martin. The submarginal spots on the underside of the hind wing don't appear on our Holly Blue. I've always used my old (1992) Peterson Guide as my Bible for US species and this doesn't feature C. ladon - so maybe I should treat some of it with suspicion.....
Hampshire Dragonfly recorder
Hampshire & IOW Wildlfe Trust
Lat/Lng: 43.3352, -70.5485