When I lived in the PNW, it was Amazon trucks all day. Now that I live in rural Tennessee, it's USPS usually with anything containing a Lithium-Ion Battery coming via UPS.
@PhoneBoy we get the full variety: Amazon trucks, USPS and apparently UPS. When the 1st mouse ordered didn’t show I complained and they sent a new one via Amazon - except when it showed up another day late, it was a bundle of plasticey fabric, not a mouse.