There are many species of Carpenter ants and all are in the Genus of Camponotus. Northern Carpenter ants differ from the Southern Carpenter Ants we have in Florida in both appearance and Habits. However Nik's post about Carpenter Ants is typical of those Carpenter Ants in the USA even if they are different Species.
BTW Fipronil is on the EPA hit list.
You can lead a Donkey to water but you can't make the Jackass Drink
"As Americans you have the right to be stupid." John Kerry
"Life is tough, but it's tougher when you're stupid.” John Wayne.