Horseflies are called horseflies because the Tabanidae family( a fly family ) is commonly called horseflies!!!!!!!!!!!! :D
Yes.
Summer heat.
Horse Flies fly by flapping there wings, like every other living flier.
Here's a quote from a great Web site on tabanids (horseflies). "When the fly emerges from its pupal case females will seek a blood meal, whilst the males feed on nectar. The next priority for a...