Lipotriches australica

''Lipotriches australica'', commonly known as the green and gold nomia, is a species of bee in the family Halictidae. It was described by Frederick Smith in 1875, and is widely distributed across mainland Australia. It is approximately the size of a European honeybee, and it is a buzz pollinator. When conditions are optimal, the females can nest in dense aggregations with tens of thousands of nests per hectare. Males are often seen clustered together in roosting aggregations. This was one of four species featured in a set of native bee postage stamps, which were available from Australia Post in 2019.