Does anyone have trouble with these buggers invading your woodpile? Smaller than carpenter ants, are about 1/4 to 3/8" long with black head/butt and red abdomen. They bite like crazy. They are constantly in my sauna building and any wood pile that is stacked on the ground nearby it, especially in wood that has any punky area. I doused a huge nest in a rotten stump and my old woodpile with ant poision last year. Stacked the new wood pile across the lawn and off the ground, so far they have stayed away.