Honeybee populations are again declining, threatening crops. But the honeybee is not the only bee that can work in the fields ...

Honey bee populations are again declining, threatening crops. NPR's Scott Simon talks to Dave Hunter, who raises the unsung hero of the orchard (and champion pollinator), the Mason bee.

But behold the humble mason bee! Also called the blue orchard bee, it inelegantly "belly flops" onto a flower, Hunter says. It flings pollen everywhere. Covered in pollen, the hairy mason bee then ...