These are the questions typically asked by homeowners who have carpenter ants. Carpenter ants are one of the most common ants found in Green,Fulton , Montgomery counties.Amsterdam, Schenectady, Johnstown, NY They are also one of the most difficult to control.Carpenter ants, vary in size and color but are usually large (1/4-1/2 inch) and blackish. Occasionally, swarms of winged carpenter ant reproductives will emerge inside a home. Carpenter ant swarms usually occur in the spring and are a sure sign that a colony is nesting somewhere inside the structure.