Are black flies most active from dusk to dawn?

The statement about black flies being most active from dusk to dawn is false. In reality, black flies are typically most active during daylight hours, especially in the early morning and late afternoon when temperatures are mild and their food sources are available. They are generally attracted to areas with running water, where they carry out their life cycle, and their flying patterns are influenced by sunlight and temperature.

The other choices, like their activity being limited to only shaded areas or during the rainy season, do not accurately represent the behavior of black flies, as they can be found in various environments and are not exclusively reliant on these specific conditions for activity levels. Understanding the habits of black flies, including their peak activity times, is important for effective pest management and personal protection against bites.