Looks like mayflies are emerging from area lakes and streams. The mayfly is an interesting insect. The adults, which is what you are seeing, do not feed and only live for a few hours or days, just long enough to mate and the females to lay eggs back into the water. The emergence from the water is fairly well synchronized and only lasts a few days, when literally millions emerge nearly at once. They do not have functional mouthparts and do not bite. Most of its life is spent as a nymph in the water.
Extension is committed to helping Nebraskans know more about creating resource- and energy-efficient rural and urban landscapes, protecting and managing water resources, properly managing insect and wildlife pests, and more.
Active in all 93 counties and at communityenvironment.unl.edu