Bumblebees are dying off in large numbers as well as honeybees. The honeybees are thought to be dying from the elusive colony collapse disorder. They still aren't sure about the cause of the bumblebee deaths. Some factors being posited are the herbicide Round-up, habitat loss, climate change, and lower genetic diversity. Bumblebees pollinate many of our food crops such as berries, peppers and tomatoes. All of which I would surely miss if they weren't around.