Winter Loss Reports

The Winter Loss Reports were being conducted even before BIP was founded; in fact, the results of the report were part of the reason BIP was created – to solve the continuing loss of honey bees over the winter. Here, you can find all the winter loss reports dating back to the first one in 2006.


2012-2013: Preliminary survey results indicate that 31.1% of managed honey bee colonies in the United States were lost during the 2012/2013 winter. This represents an increase in loss of 9.2 points or 42% over the previous 2011/2012 winter’s total losses.

2011-2012: In the US, the total colony loss was 22.5% for the 2011-12 winter; 45.1% (n = 2,482) of respondents reported no colony loss. Total loss during 2011-12 was substantially lower than loss during 2010-11 (29.9%).

2010-2011: Survey respondents reported that they had lost an average of 38.4% of their colonies, for a total US colony loss of 29.9% over the winter of 2010-11.

2009-2010: Over the winter of 2009-2010, US beekeepers responding to this survey lost an average of 42.2% of their colonies, for a total loss of 34.4%.

2008-2009: This study records the third consecutive year of high winter losses in managed honey bee colonies in the USA.  Over the winter of 2008-9 an estimated 29 % of all US colonies died.

2007-2008: A total loss of 35.8% of colonies was recorded; an increase of 11.4% compared to last year.

2006-2007: The total loss and average loss of bees in all operations was 31.8% and 37.6%, respectively. Of the surveyed beekeepers, 51.9% reported “abnormally heavy losses”; these beekeepers had a total loss of 55.4%, compared to the 15.9% total loss experienced by beekeepers who reported “normal losses”