Small Carpenter Bees (Genus Ceratina)

Ceratinа is a genus of small carpenter bees within the tribe Ceratinini (Subfamily Xylocopinae, Family Apidae, Order Hymenoptera). The genus is widely distributed across the world, occurring in tropical, subtropical, and temperate regions. Species of Ceratina are commonly found in gardens, grasslands, forest edges, and other habitats rich in flowering plants.

Members of the genus Ceratina are generally small, slender bees with a smooth and often metallic body, typically green, blue, or black, sometimes with pale or yellow facial markings. Compared to many other bees, they are relatively hairless, though they still possess structures for carrying pollen. The head is proportionally large, with well-developed compound eyes and short antennae.

A defining characteristic of Ceratina is their nesting behavior. These bees typically nest in soft plant stems, pithy twigs, or hollow vegetation. Females excavate tunnels within these materials and construct a series of brood cells, each provisioned with pollen and nectar for developing larvae. Unlike many solitary bees, some Ceratina species exhibit simple forms of social behavior, including maternal care and nest guarding.

The life cycle involves complete metamorphosis. Larvae develop within the nest cells, feeding on stored provisions before pupating and emerging as adults.

Adults feed on nectar and pollen and are active pollinators of a wide variety of flowering plants. Their small size allows them to access small or delicate flowers that may be less accessible to larger pollinators.

Ecologically, Ceratina species play an important role in pollination, particularly in diverse plant communities. Although often overlooked due to their small size, they contribute significantly to plant reproduction and ecosystem health.