07/06/2020
Fact of the day!
Do you know something about interesting about little house fly?
Little house fly fannia canicularis is not tolerant of high daytime temperatures and is, therefore, generally most numerous during the cooler spring and fall months in California. As temperatures rise in summer, populations of Fannia diminish unless developmental sites are protected from temperature extremes.
Adults are approximately 2/3 the size of the house fly and lack the house fly’s distinctive thoracic stripes. Fannia at rest hold their wings directly over the back rather than holding the wings to form a V-shape as is typical for house flies. Flying aggregations of male Fannia typically form in areas with still air and protected from direct sunlight, such as breezeways and porch areas of residential homes. These swarms of males remain in continuous flight awaiting visitation by unmated females. Male swarms are often formed approximately 5 or 6 feet above the ground; just about head height for an adult human thereby maximizing their nuisance potential. Strong air currents tend to disperse these male aggregations.