Greenhead flies, a biting horsefly, are rampant from July through mid-August.
From the timesunion.com
The size of a horsefly, it sits easily in the palm of his outstretched hand.
From the newscientist.com
They are similar in size to a horsefly and breed along rivers and streams.
From the sciencedaily.com
Basically I'd been bitten by a horsefly and had nothing to worry about.
From the guardian.co.uk
She has scars from horsefly bites, thorns and wire fences.
From the usatoday.com
More examples
Horse tick: winged fly parasitic on horses
Large swift fly the female of which sucks blood of various animals
Insects in the order Diptera, family Tabanidae, are commonly called horse flies, and sometimes also forest flies or deer flies. The former, however, can also refer to Hippoboscidae, and the latter refers specifically to the horse-fly genus Chrysops. ...
Any of several large flies, of the family Tabanidae, that suck the blood of mammals; Stomoxys calcitrans