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Horse Fly - Tabanus - female

Horse Fly - Tabanus - Female
Archbold Biological Station - Lake Placid, Highlands County, Florida, USA
August 28, 2010
Located on native Florida diamond-plate. Swarms of these things seem to follow anything that moves on a 4-wheeler at Archbold; it is a bit disconcerting to be zipping along at a good clip and realize they are all keeping up. Oddly, while one or two might try for a meal when I stop, most of them just disperse when the 4 wheeler stops.

Moved from Tabanus fusconervosus.

Tabanus fusconervosus should have the wings with spots.

This might be T. gracilis based on the darkened wing vein margins, but I'm not sure, the abdominal pattern is a bit different than what I thought. The abdominal pattern and frons of T. zythicolor is far too different from this fly.

Photo of zythicolor:

Moved from Tabanus. I think it's Tabanus fusconervosus, thanks for contributing.

Thank you
for the ID! It is always cool to be able to fill a hole in the guide.

It might be
T. zythicolor, but this specimen seems to have darkened wings. I'm wondering now if that's just due the angle and some shadows

Moved from Horse and Deer Flies. Yes, males are not hematophages.

Horse flies are among the, if not the, fastest and most agile flying insects. This makes collecting them a challenge if you're on foot.

I've also seen horse flies chasing cars; I suspect the movement and CO2 in the exhaust makes the cars seem like delicious large mammals. In Ecuador some would land on the car when we stopped and even succeed in biting the tires. I always leave a window cracked in case one flies in. Some rare species have been collected inside cars.

I've heard several colleagues claim they've collected horse flies by driving along with the hood open, then stopping suddenly and shutting the hood after a second, trapping the flies inside the car. I've never tried that method personally though I have caught some by jogging behind moving cars (driven by friends who knew I was there!) swinging a net.

like mosquitosthe females are biters and the males dont need blood

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