Have you ever been hanging out with your birds and a beam of light comes shining through the window and you suddenly see all of the dust in the air?
My poor lungs haven't been abused enough so I fall in love with the dustiest creatures on this planet.
IDK is there a dustier creature on this planet?
First, the level of dust in ones home is a combination of the greater amount of tiny dust bits outside, which is the combination of space dust falling in (or burning-up) into dust bits, the smoke bits from Canadian forest fires (or California), Russian forest fires, dust from the Great Deserts of China, all of which, fully circle the earth, volcanic activity up to three centuries ago, tree pollen, oh almost forgot the Great Deserts of Northern Africa. That stuff represents a Huge load of junk that is in that air, before we even talk about the smaller volume of what Humans and Animals add.
So, every time you open a door or window, all that stuff comes in and is added to what we and our animals add.
Interesting, all that stuff does not make it past our sinuses. But the smoke will because segments of it is heavier.
Dustiest creates on earth, by volume, are the herd animals. I would not recommend sharing a room with a Buffalo. Was owned by a horse at one time. A true joy, but the dust! Full-on Amazon molt, easy!