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Emil's picture

Today I got a swarm, I was sitting about 30 feet away from where the swarm got into a tree (this is the second time this pine tree is used as a swarm stop). I heard a lot of summing an looked out and the air was full of bees.

The hive where they came from dropped about 2 kg (4 pound) and what I wonder about if this could be seen before.
I have looked at the graph and found some interesting in the humidity, see what happend yesterday where the humidity suddenly increased a lot, just the same that happend when the swarm took away. Anyone seen this before?

Paul's picture
Swarm analysis

Emil, See the 2nd page of the Hive Reports for April 14, 2014. This was one of the better issues.


Dr. Seeley, at Cornell, was kind enough to explain what was going on. The temperature increase AFTER the swarm was a surprise to me. I would have expected it to go up before the swarm, as the bees are getting excited and warming up and then fall after the swarm when there were fewer bees in the hive. The increase in humidity (evaporative cooling) was more pronounced in that example. (Your humidity curve has a good bit of "noise". Do you run screened bottom boards?) The temperature spike after the swarm leaves is a tell tale signature. If you look back at Oconee2 or SC008, you can see several swarms (and temperature spikes) in the last 30 to 45 days. Actually, spread your curve out by just looking at one day and you may see the humidity slowly ramped up. I agree that perhaps there was an aborted swarm attempt the day before.

Why did your weight come back up after the swarm? Was that a manipulation change or did the swarm return to the hive?

SC008 Swarms

The SC008 has had 2 swarms, Oconee2 has not. I looked at the SC008 humidity, it did not have a spike before the first swarm, but it looks like there may have been one just before the second one. It's hard to tell because it has so much chatter.

Weight of hive that swarmed

Emil, The weight of the hive is about 31 pounds. That seems light for a hive that is big enough to have swarmed.

Is this hive calibrated in kilograms or did you zero the scale with the woodenware (bottom board, supers and frames and cover) on it?
I suspect this scale is calibrated in kilograms in which case Paul needs to get the software working where you can report in kilograms and users can select the units they use to view the graphs.

Emil's picture
Updated swarm...

Carl, Yes I have it calibrated in kilos (so I can understand it...), the first picture was with NASA filter
Paul, I didn't have in my bottom boards when this happened (It was set in yesterday to take sample which I have to send in to the Food Safety Authority)
Here is the RAW data and it lost about 2 kg in the swarm, The big drop after was when I took off the top to check.
What I'm interested in to understand and maybe if it's possible to be alerted before this happens to avoid swarms, is like you said Paul that there was a humidity increase the day before, and if we can be alarmed if this things happens.

Esa's picture
did anyone had sound

did anyone had sound recordings on, noticed any changes in sound patterns prior swarming ?

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