Horse Flies are larger than House Flies (up to 1 in long) and dark-colored with clear wings. They have very large eyes that extend sideways. The females have a nasty bite.
Horse Flies are most abundant during the summer and only fly during the day. They breed in moist areas.
Could it be? Deer Flies, a species of Horse Fly, are smaller (.4 in long) and narrower with dark patches on their clear wings.
Did you know? Horse Flies can be traced back to the Late Jurassic period in China, 145-160 million years ago.
See Also: Black Fly, House Fly
Easy - numerous and usually easy to spot
in the habitats listed at the appropriate time of
year.
Forests are large areas of trees growing close
together.
Grasslands are large open areas covered with
grasses. They have very few trees or shrubs.
This habitat includes prairies and tundra.
Wetlands are low-lying areas that are covered by
water all or most of the time and support a variety of
aquatic plants. This habitat includes rivers, streams,
lakes, ponds, bogs, and marshes.