Nerodia fasciata pictiventris
(Cope 1895)
Miami-Dade Co., Florida. July 17, 2016.
I found several of these snakes in and around the Everglades. In that area, and in July, the mosquitoes are amazingly thick and nasty at night, making roadside photos a challenge.
My Flickr album for this species is here.
HerpMapper records for this species are here.