On 4/29/2016 4:39 PM, Scott Koppa wrote:
>    
> It seems basic, but has a temperature trigger been disproved?
>    
>
I would guess that if it were temperature then Mediterranean bees would 
produce winter workers right through the summer when moved to certain 
northern climes.   I wonder if the stimulus is something to do with the 
equinox.  Sun worshippers are bound to notice day length.  Regarding the 
life span of winter bees it might depend, to some extent, on the length 
of the winter in the part of the world where the particular ecotype evolved.

Steve Rose
N. Wales (where the winters are long and wet)


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