Tiny White (or Clearish) Flies

[cheveyo]

I wish I had a picture, but alas I do not.
My aunt has teeny tiny flies plaguing her house (especially at night). She says they are white (or clearish) with little green nubs on the tail area. They only live about a day, and she has found thousands of them dead on her patio table.
Does anybody have any idea what kind of insects these could be?

[lepidofrance]

Again, apply insect identification (here two or three days ago, it was a green spider) with the only indication: the "patio table" (for the green spider: it was the "HVAC condensing ")!

(I am French and I do not know what a "HVAC condenser"; a fan of air conditioning?)

The authors of these queries could still be said that

1. they are not the center of the world
2. entomologists are not omniscient and do not know all the insects of all countries!
3. provide a geographic location (State, altitude, town or countryside, forest area or openfields, sand desert or wet area, and so on, and not "patio", "table", "HVAC condenser") would be appropriate!

This would enable the Entomologist on duty to undertake a little research

[cheveyo]

She lives in mid-Michigan near a forested area. My mom said from far away they looked like the seeds from white dandelions.

[lepidofrance]

"She says they are white (or clearish) with little green nubs on the tail area. They only live about a day"

May be Mayflies (Ephemeroptera). See the attached photo.

And check on the page :

en.wikipedia.org/wiki/Mayfly

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[entoman]

Seems very plausible that they could be Mayflies as there very often are large swarms in Michigan compliments of its proximity to the Great Lakes. However, the "teen-tiny" size and "little green nubs" tend to make think it may be something else... What else I am not sure.