Burrowing bees of the very large genus Leioproctus push up conical heaps of loose soil at the entrances of their shafts as they burrow down to depths of up to a metre. They prefer bare ground and often nest close together. Their males may hover about over the nesting areas awaiting the emergence of unmated females. A species with a blue-black abdomen commonly nests in Perth lawns in spring creating volcano-like mounds of yellow sand.