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Carpenter bees sometimes are mistaken for bumble bees, which have a similar appearance. A carpenter bee is about ¾ to 1-inch long and nest in excavated tunnels in wood.
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Carpenter bees can be timber pests, and cause substantial damage to wood if infestations go undetected for several years. [12] Two very different mating systems appear to be common in carpenter bees, and often this can be determined simply by examining specimens of the males of any given species. Species in which the males have large eyes are ...
[16] Mother bees can begin nurturing their brood earlier in the season when the nest is warmer, allowing them to develop faster and giving the mother bee more time to bring up more progeny. It also ensures that the offspring are mature enough by the end of the summer, allowing enough time for feeding and mating before overwintering.
The bees will tunnel through wood with their mandibles, although they do not ingest the wood in the process, and they avoid painted or stained wood. The tunnels average 6 to 10 in (15 to 25 cm) in length and consist of a linear series of partitioned brood cells. [12] [13] The adult bees spend the winter
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The blue carpenter bees fly from mid-March to mid-October, [5] collecting pollen at various families of plants, especially knapweed , yellow composites and Lotus . [ 6 ] Females dig the nest extracting the soft tissue that fills the cavities of the vertical or slanted dry plant stems and small branches, [ 7 ] [ 6 ] such as thistles ...