Type of ant?

[bugdude123]

Hello! These ants recently started invading our house in Chicago, IL. They're pretty small (1/8 in maybe) and are voraciously eating Terro borax ant killer which I think is sweet tasting. I've noticed smallest ones with small black abdomens, others have larger striped abdomens (stripes are a brownish yellow), and some have huge abdomens (seen in video) which I'm assuming are queens.

Video on imgur: imgur.com/gallery/LkkFUts

I can probably get some clearer pictures if needed.

Thanks!