Mosquito nets may not be sufficient to prevent sandfly bites. Once the amastigotes are ingested, they enter the midgut of the sandfly. Prevention of "L. mexicana" infection is principally avoiding the bite of the infected sandfly. The adult female sandfly is a bloodsucker, usually feeding at night on sleeping prey. At least 93 sandfly species are proven or probable vectors worldwide. Traditionally, canine transmission is directly from sandfly to dog. The free amastigotes in peripheral tissues are then ingested by sandfly to enter another cycle. The sandfly species "Lutzomyia longipalpis" is the primary vector of this disease. The reproduction of Leishmania braziliensis vector, the sandfly, is dependent on environmental conditions. "L. donovani" undergo further development only in the digestive tract of the female sandfly. The Souris River Post near Sandfly Lake operated from 1875 to 1939. These include Allans Beach, Boulder Beach, Victory Beach, and Sandfly Bay. Sandfly Bay is best known as a tramping site. Sandfly Bay is occasionally used by naturists for nude sunbathing. Dogs are not permitted at Sandfly Bay as it is a wildlife reserve.