> On 9 Dec 2020, at 3:09 PM, Etienne Tardif <[log in to unmask]> wrote:
> 
>   The picture of the cluster attached is from Oct 29. The bees looked calm and not agitated at all when I added a sensor on the back edge. But the T chart tells a different picture, clear energy step up for a couple of days. 

Hi Etienne & All

Although I agree that any disturbance of the colony even as minor as walking past or knocking on it with your knuckles will result in increased activity of the cluster, your disturbance of Oct 29 shown on the picture appears to split the cluster which would be a major disturbance. The U of Guelph have done studies, with temperature sensors, of cluster activity, but I’m not sure if they were serious or casual.

Bob Darrell
Caledon Ontario 
Canada 44N 80W
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