Yellow Swallowtail in the Lilac

I was sitting outside on my covered porch this morning, after potting about 16 annuals for my patio, watching two Swallowtails enjoying the lilacs. I was too lazy to go inside and get my phone, but was eventually motivated to go get it by the persistence of one Swallowtail.
The camera on my OnePlus 13 is a Hasselblad system.