Yesterday I saw something I've never seen before. On a swamp milkweed. This bug has the same colors and "furryness" of a normal bumblebee, but was huge- maybe double the size. Also, it had different "antennae" and a very big sucker thing (like the straw part to drink nectar, not sure the name). Also, in flight, this guy moves like a hummingbird. Even while drinking the juice from the flowers, he didn't "land" and stand there like normal bumblebees, he hovered!!! Difficult to clearly photograph in fact.

Anyone have any ideas about this please? It was a little freaky to see a totally new bug!!!