Carpenter Ants (Camponotus pennsylvanicus) a.k.a. Black Ants or Big Black Ants. Very common in areas that have a high water table. They seek out high moisture areas in and around structures. They usually nest either in damp wood or close to it. They may be found in hollow doors, in attics near clogged gutters or areas that have been subject to water leaks. Ludlow, MA, USA. Summer.