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Deer Flies

Deer Flies
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The family Tabanidae, commonly known as horse flies, and deer flies, are pests for cattle, horses and humans. Tabanids are most likely encountered in hot summer and early fall weather. They are active during daylight hours.

For Deer flies, nearly all species are 0.25 to 0.33 inches, longer than head, nearly uniformly slender, Wings are dark bands or patches on a clear background and most species will bite humans but typically only bite moving animals.

Eggs are laid in masses ranging from 100 to 1000 eggs also eggs are laid in layers above wet areas and Aquatic vegetation is preferred. Eggs are initially a creamy white color but soon darken to gray and black. Eggs are cylindrical in shape and measure from 1 to 2.5 mm in length. Eggs hatch in five to seven days, depending upon weather conditions, and the larvae fall to the moist soil and water areas below.

Next stage Larvae use a hatching spine to break out of the egg case. The larvae are aquatic, semi-aquatic or terrestrial. Meaning basically can be anywhere.