Small carpenter bees in the genus Ceratina are tiny, metallic blue-green or black bees that are among the most common native bees in Arizona gardens. Unlike their large relatives (Xylocopa), small carpenter bees do not drill into solid wood. Instead, they nest in the pithy centers of hollow or broken plant stems — including elderberry, sumac, rose canes, and many other plants with soft pith. Females excavate the pith to create a series of nest cells, each provisioned with a pollen-nectar mass. Small carpenter bees are among the few native bees that exhibit some degree of maternal care — females remain in the nest guarding their offspring for an extended period. They are active year-round in Arizona's warm lowlands, providing pollination services during winter months when most other bees are inactive. Small carpenter bees are completely non-aggressive and pose essentially no sting risk. They are important pollinators of many native and garden plants.
👁Warning Signs
Tiny metallic bees on flowers year-round. Nesting in broken or cut plant stems. Small entrance holes in the cut ends of hollow stems.
⚠Health & Property Risks
Essentially zero sting risk. No structural damage (nest only in pithy stems, not solid wood). Entirely beneficial.
Prevention Tips
No prevention needed. Leave hollow plant stems standing through winter to provide nesting habitat.
🛡Professional Treatment
No treatment warranted.
Frequently Asked Questions — Small Carpenter Bee
The Small Carpenter Bee (Ceratina spp.) is metallic blue-green or black; some with pale facial markings and typically measures ⅛–⅓ inch. Small carpenter bees in the genus Ceratina are tiny, metallic blue-green or black bees that are among the most common native bees in Arizona gardens. Unlike their large relatives (Xylocopa), small car.
The Small Carpenter Bee is generally low-risk, but caution is still advised. Essentially zero sting risk. No structural damage (nest only in pithy stems, not solid wood). Entirely beneficial.
In Arizona, small carpenter bees are most often encountered in the following situations: Tiny metallic bees on flowers year-round. Nesting in broken or cut plant stems. Small entrance holes in the cut ends of hollow stems.
The Small Carpenter Bee is most active during: Year-round in Arizona's warm lowlands. Arizona's warm desert climate can extend activity periods compared to other states, so year-round vigilance is recommended in the Phoenix metro and surrounding areas.
No prevention needed. Leave hollow plant stems standing through winter to provide nesting habitat.
No treatment warranted.
If you are seeing small carpenter bees repeatedly, finding evidence of an established population, or if DIY treatments have not resolved the issue within a week or two, it is time to call a professional. Pest Control Bros offers free inspections and same-week service across the Phoenix metro area — no contracts required.
Dealing with Small Carpenter Bee?
Pest Control Bros LLC serves Maricopa, Chandler, Casa Grande, Tempe, Gilbert, and Mesa. No contracts. Free inspections. Same-week service.
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