Instead of establishing colonies with other members of the same species, carpenter bees construct individual nests in wood structures. Commonly Asked Questions Why do I have carpenter bees? Overall, the bees may live as long as three years. Adults emerge in August, feed, and then return to the same tunnel to overwinter and begin the process over. The insect spends an average of 2 days as an egg, 15 days as a larva, 4 days in a prepupal stage, and 15 days as a pupa. Typically, eastern carpenter bees produce six to eight eggs at a time. After creating new space for eggs in existing burrows, females stock the chambers with bee bread, deposit an egg, and seal off each chamber. Life CycleĪdult males and females overwinter in wood tunnels and emerge in the spring to mate. Developing carpenter bees obtain nutrients from “bee bread,” which is composed of pollen and regurgitated nectar by females. Although the insects contribute to the pollination of many flower species, eastern carpenter bees often bite into the bases of flowers and steal the nutrients without pollinating. Instead, adults survive off the nectar of many different flowers. Unlike termites, eastern carpenter bees do not eat wood as they excavate tunnels. Excavated galleries are an average of 10 to 15 cm long but may extend up to three metres in length with repeated use and when several females are nesting at the same time.
The bees also prefer surfaces without paint or varnish. Eastern carpenter bees demonstrate a preference for coniferous wood and are primarily associated with forests in the United States and Canada. Habitat, Diet, and Life Cycle HabitatĮastern carpenter bees create nests by burrowing into wooden doors, windowsills, roof eaves, shingles, railings, telephone poles, wooden lawn furniture, decks, bridges, or any wood greater than 50 mm thick provides suitable space for the bee. Another useful strategy for managing eastern carpenter bees involves purposely placing slabs of wood, which are ideal for burrowing, away from the home to give the insects a more suitable nesting option than household structures. Instead, homeowners should consider painting or varnishing external wood to deter carpenter bees, as the insects prefer untreated wood surfaces. While pest control specialists may be called in to handle infestations with pesticides, killing the bees is strongly discouraged.
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How to prevent Carpenter Bees from invadingĪs with most bee species, eastern carpenter bees are ecologically important. Additionally, homeowners may notice accumulations of pulverized wood on the ground below nest entrances. Still, spotting the large bees lingering around wood structures is an indication of carpenter bee activity or infestation.
Although the insects may appear aggressive to humans, the bees usually guard against other insects and care little about people. Male eastern carpenter bees often hover around the openings to nests.
As unaggressive creatures, female carpenter bees only sting when seriously provoked or handled. Furthermore, female eastern carpenter bees possess stingers while males do not.
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Males have a yellow patch on their faces, while the faces of females appear solid black. Eastern carpenter bees range in size from about 19 to 25 mm long, and the males and females differ slightly in appearance. While the abdomen of the eastern carpenter bee appears shiny and black in colour, the thorax is yellow and fuzzy.
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