End of the Year for bees....

We have had a rather warm winter so far.  Just a little cold weather and nothing really below 28 degrees.  This is unusual and I am concerned about the bees having enough food stored to last until spring when the natural nectar flow starts.  Today, the weather was seasonably cold so I went up around to the back of some of the hives.  How cool it is to put my ear to the back of the back and give 1 sharp tap on the box.  Hives that are still alive will give a short loud buzz !  Today every hive buzzed.. so far so good !