I saw other swallowtails - only spicebush, I rarely see other species - nectaring at distant orchids. That's somewhat frustrating - over here! over here! I feel like shouting - but chasing them madly about with camera is no way to operate. It's just likely to spook the butterflies, and rushing into position makes it tough to compose a nice image.
Better to set up out of the pollinator's sphere of awareness, in perfect light and on a prime plant, and let the subject come to you.