1) I agree—I think they're
midges, too.
2) Chiggers (or "Red Bugs") are probably the worst kind of bite. You don't know you're bitten, and the itching lasts for a week. Tall, wet, grass in the Southeastern U.S. is their favorite haunt.
I don't know who named the pond that's located not too far from my Florida lake. The owner probably didn't seek companionship there, at "Red Bug Lake".
3) Florida has
native fireants!
(They're just not so big).
4) Judging by the odd postures in the "swarming"
there's likely an out-of-focus spiderweb involved.