In Australia there are four main bee families: Apidae, Colletidae, Halictidae and Megachilidae. Many of these bees are solitary nesters, while others may share a nest. Others are fully social species. Although some bees sting, they are not considered to be pests as they play an important role in the Australian environment as key pollinators of many native plant species.
Honey-bees frequently lodge in wall cavities, or settle as a swarm on or near buildings. In these circumstances they may present a danger to humans and animals. Treatment usually consists of removal or elimination of the colony.
Just about any insecticide will kill bees as they are very susceptible to poisons.