Black flies usually emerge in the spring and continue to harass residents of homes and parks until about mid-June. But this year, an unseasonably cold spring allowed this pest to flourish, resulting in a black fly population boom in upstate New York. Adult black flies lay eggs in natural bodies of cold water. However, by mid-June, these bodies of water become too warm to support the larvae.
When the temperature starts to drop, many flies, including cluster flies, will begin to find their way into homes. These insects tend to gather in large clusters on walls and floors to stay warm. They will look for small cracks to sneak into homes, and they can even make it to basements and attics. Common access points include baseboard, window panes, fans, and light fixtures.
Common flies are an annoying nuisance, but there are also rare species that can cause allergic reactions or spread disease. Most flies-related illnesses are acquired overseas, though. The common house fly is a grayish-black insect that can be up to a quarter-inch long. Its body is covered in hair. Female house flies can lay as many as 1,000 eggs within two weeks. These flies lay their eggs in organic matter that attracts the insects, such as dog poop, trash, and things with strong smells. To reduce the number of these pests in your yard, you can try covering up garbage and pet food containers.
Although it can be difficult to tell the exact dates of the end of the flies season in New York, you can generally expect swarms of biting flies during the summer months. In New York State, the flies season usually lasts from July to September, although the flies can start a bit earlier if winters are mild. You should prepare yourself accordingly by purchasing appropriate clothing, repelling flies, and using insect repellents.