What To Know About Beach Flies
Biting flies at the beach fall into two main categories. First, you have the tiny ones that go by several names, including sand flies, biting midges, or no-see-ums. These little buggers are common along the coastline, but they are not alone. The other main kinds of biting insects are beach or horse flies, and their bite packs a wallop. Unlike biting midges, horse flies resemble house flies, but they tend to be much larger and have green heads.
Beach flies love a warm, humid environment, and tidal flats, marshes, and dunes have it all: warmth, safety, water, and a stable food source—humans. They tend to be most active during the day, around the same time you and your family want to enjoy a day at the beach. Biting flies are attracted to the carbon dioxide you exhale and the warmth of your body, and they can be pretty persistent, leaving you with painful welts as a souvenir of your time at the shore.