Sand flies are found in tropical, subtropical or temperate regions as well as cooler climate areas throughout the world. Sand flies live in both freshwater and saltwater habitats.

Sand flies are tiny insects that cause painful bites, which produce welts that can last for several days. Sand flies are known to transmit several diseases and parasites, such as filarial worms, to humans and animals. These flies are most active at dawn and dusk, from mid to late summer. The best protection to combat sand flies may be regular use of anti-parasite products that have a repellent action, according to CVBD.