"Xylocopa", Carpenter bees, are large bees distributed worldwide. Their name comes from the fact that nearly all species build their nests in burrows in dead wood, bamboo, or structural timbers (except those in the subgenus Proxylocopa, which nest in the ground). Members of the related tribe Ceratinini are sometimes referred to as "small carpenter bees". Males of some species have a white or yellow face, where the females do not; males also often have much larger eyes than the females, which relates to their mating behavior.