The White Admiral lives in deciduous forest borders and glades.
They alternately sail and flap, darting out at insects or other interlopers in their territiories.
They also perch on leaves, twigs, or other prominences, taking aphid honeydew or liquids from flowers and carrion. I have heard that admiral butterflies were originally called “admirable” butterflies.
Here is the much smaller Red Admiral:
On this day I explored the northern section of the Seton Trail which follows Duffins Creek:
O summer day beside the joyous sea!
O summer day so wonderful and white,
So full of gladness, and so full of pain!
Forever and forever shalt thou be–
To some the gravestone of a dead delight,
To some the landmark of a new domain.” – Henry Wadsworth Longfellow (1807–82)