aggressive behavior

2nd full year of bee keeping. Have 4 hives, two of them from bees acquired this spring. One of the two is doing well; the other one has grown like gangbusters and has filled two 10 frame deeps and moved into a super. In July I began to notice aggressive behavior from the gangbusters colony...

I started with my first TBH last Spring and all went very well...until this Spring. When the weather was warm enough to check on them after Winter they were highly aggressive. I was told this was probably because there were so many bees in the hive. So they swarmed....twice and I caught both...

I bought a 3 lbs package of bees from Wolf Creek 4/6/2013 and they are overly aggressive to the point of following me beyond twenty feet from the hive and staying my constant companion. Anyone having similar experience from a package bought from Wolf Creek around April 2013? Yesterday one...

So I put feeders on two of my warren hives about a month ago. I went to day and saw they were empty so decided to take them off and do a quick hive inspection. I did not smoke since my bees are hardly ever aggressive. As soon as I pulled the first frame, the hive erupted and I was swarmed. I got...