The BBKA's winter survival survey a few weeks ago showed losses across the UK of 34% with figures for the North East (where almost all BeeCosy sales have been made) of 38%.
We have surveyed all Bee Cosy users on the same basis as the BBKA survey - i.e. colonies in place at 31 March. Although our sample is not large as the BeeCosy was only released last autumn we have achieved a 77% survival rate from all those responding.
Interestingly, on comparing over-wintering practices among BeeCosy users it appears that keeping varroa trays in may be beneficial to helping your colony survive harsh winter conditions.
Many thanks to all those responding to the survey.