At first glance this may look like a bumble bee; but, it's actually a large, bumble bee mimicking robber fly (Asilidae), most likely in the genus Laphria. These are excellent predators, and sometimes of the very bumble bees they mimic! You can spot these right away if you know that like other flies, they only have one pair of wings, unlike bees which have two pairs. Plus the short antennae, huge eyes, and lack of mandibles. Plus, I wonder how many pictures of my thumbs are out there on iNaturalist...

Mason bees, most likely Osmia lignaria, collecting mud for their nests!