to whether the S. saevissima queen mates with only one single drone or multiple drones, one can only assume that the sister workers are related to each other and the immature broods by 50% - 75%. This is still closer than the 50% relatedness the workers would have had with their own daughters. Then it is no surprise that the eusocial workers do give up their reproductive ability to take care of their sisters because, mathematically, they are able to pass on more of their genes in this method. But of course they are only related to their brothers by , so haplodiploidy alone does not explain the origin of eusociality. Behavior Foraging S. saevissima often displaces the other ant species within the vicinity of its nest because it is omnivorous and opportunistic and prefers abundant food supplies, therefore reducing the resources for others. Its typical diet includes sugary juices from dead beetles, isopods, and plants. Small and middle-sized workers generally forage alone in paths of irregular loops when away from the colony. If they find a small, single food source, they will attempt to drag it back to the nest. However, if the food source is too large or is in several components, the worker will first inspect it for 10 to 30 seconds, feed itself, and then secrete a trail substance by the Dufour's gland to recruit fellow workers. This secreted pheromone attracts and excites the workers, drawing them to the direction indicated by the trail. The trail consists of fragments of secretion and is extremely specific to each species. Intrinsically, the secretion itself reveals neither the quantity of the food nor the quality. The quantity of food is described by the number of ants in the mass forage since the larger the quantity of food, the more ants will be attracted. However the number of workers in the mass forage does stabilize at a certain level because those who are unable to reach the food leave without laying any trails. The quality of the food is communicated through percentage of positive responses: workers can choose whether or not to secrete trail substances depending on their preference of the food. The more scrumptious the food, the more trails. However, if the food is beyond the radius of 5 to 10 centimeters from the colony, the workers will abandon the trail and turn around. The longer a worker is