Carpenter bees are 3/4 to 1 inch long and closely resemble bumble bees except that their abdomen is a shiny metallic greenish-black whereas the abdomen of bumble bees is very hairy. These insects sometimes build their nests in solid wood such as weather boarding, railings, supports, and trim of buildings. Their nests are in the form of tunnels 3 to 6 inches deep in the wood. The entrance hole is about 1/2 inch in diameter. The holes are very clean and appear as though they were made by a drill. Damage to wood is seldom extensive.

To control carpenter bees the nesting site must be located and treated. In the case of carpenter bees the holes that the bees create lead to hollow channels in the wood where food and eggs are stored. The carpenter bee nesting sites should be treated and left open initially so the bees travel through and are exposed to the treatment. Years of carpenter bees creating nests in soffits and fascias can leave an unsightly mess.

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