Bees belong to the insect Order Hymenoptera, which includes wasps, ants and sawflies. 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.