This mangrove buckeye butterfly (Junonia evarete) posed for me at the Toni Robinson Waterfront Trail. The larval food for this butterfly is black mangrove (Avicennia germinans):
As a result, you will see this butterfly in open areas near mangroves and salt marshes.
Below is a photo of a mangrove buckeye at the Oslo Riverfront Conservation Area on a female saltbush (Baccharis halimifolia) in flower, so you know that it must be a fall photo:
Note the bee nectaring on this pollinator-attracting plant at the bottom of the picture.