Not so long ago, it was difficult to venture outdoors anywhere on the East Coast without encountering the rusty-patched bumblebee.
Named for a small brown patch on their abdomens, these bumblebees have been pollinating plum, apple, alfalfa, and other crops since long before farmers came to rely so heavily on boxed and trucked European honeybees.
Amid the plague of colony collapse disorder (CCD), some farmers are looking back to native pollinators like the rusty-patched bumblebee — as well as hummingbirds and butterflies — to help ensure that the nation can continue growing food. And in the process, they’re discovering a stinging reality that researchers have known for more than a decade: Many of North America’s once-plentiful bumblebee species have all but disappeared.
The rusty-patched bumblebee and yellow-banded bumblebee have been among the hardest-hit in the nation’s east. In the west, the western bumblebee is in similar trouble.
That’s bad news for the country’s farmers and backyard gardeners, not to mention its native wildlife. In California alone, researchers reported last year in the journal Rangelands [sub. req.] that native species pollinate more than one-third of the state’s crops, making them a multi-billion-dollar contributor to its rural economy.

Bye bye bumblebee: Honeybees aren’t the only pollinators in danger (Grist.org)