Doesn't this look like a bumble bee? It is not, though, it is a fly, an excellent bumble bee mimic. It is also a fierce predator on other insects and I would imagine that an unsuspecting victim seeing this would assume it is a bumble bee, which does not attack other insects, and feel safe! I find mimicry in the insect world to be incredibly fascinating.

You can tell this one is a fly because it has only two wings (bees have four) and the eyes are very different from those of a bee.