Name: Sharlene Sutter St. Gallen - Switzerland (Zone 6a)
Thanks to everyone for all the thumbs and a special thanks to @mellielong and @jmorth for the
@Fleur569 the body of this butterfly, Common Blue (Polyommatus Icarus), isn't actually white. Here is the original photo plus a better one showing the underside of the wings and another showing the top. This is a female.
Co-founder of www.dasirisfeld.ch in Oetlishausen, Switzerland
Thank you Sharlene, for sharing your European butterfly with us. I moderate the Butterflies, Bees, and Birds forum, and we're always happy to see pictures of pollinators! Come visit us sometime!