The Asian swallowtail butterfly (Papilio xuthus) is also known as the Chinese yellow swallowtail, and in my butterfly book, the citrus swallowtail. Whatever the name, this is the only swallowtail butterfly found in Hawaii, first sighted in 1971.
I see them mostly when I’m standing at the kitchen window, either preparing food or washing dishes. They seem to sense when I’m otherwise engaged and flutter by scenically. If I grab my camera and rush out, they’re always gone. For whatever reason, I hardly ever see them settle on a plant; they’re always flying.
This one was slightly less flighty than most and obliged by returning to the same plant several times.