Has anyone any idea to what is happening to the bees?

Answer 1

Global Warming.

As I understand it, seasons are being affected ("spring" starting sooner, "fall" lasting longer) and different animals are adapting at different rates.

A bee predator, or bee disease, may be benefitting to the the demise of the bees.

"Colony Collapse Disorder" or "a new, resistant form of Varroa destructor"