Covering an eastern cottontail.
Lots of bullfrogs in the Arboretum's streams, lots of squeaking and kerploshes as they dive into the water.
Female - with conspicuous white dot on wingtip.
Indigo bunting female?
Looks similar to Papilio troilus?
Several observed, also mating pairs. Seen nearby to Tetraopes melanurus http://www.inaturalist.org/observations/98177
Adkins Arboretum is using goats to test control of invasive plants.
Not a spiral shell, sort of a flat dome. Sealed on the underside of a leaf.