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Extension > Garden > Diagnose a problem > What insect is this? > Garden Pests > Flies, moths, wasps,and other insects with obvious wings - Under 1/4 inch long > Small carpenter bees

Rose aphid
Photo Credit: Steve Nanz

Small carpenter bees
Ceratina spp.
Size: 3/16 to 1/4 inch long

Where/When: Nest in the pith of several plants such as rose, sumac, and elder. Usually tunnels into dead canes in order to rear larvae. Active from April through September.

Significance: Tunneling may take place in healthy canes, causing them to die.
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