Preliminary analysis of loss rates of honey bee colonies during winter 2015/16 from the COLOSS survey

Robert Brodschneider, Alison Gray, Romée van der Zee, Noureddine Adjlane, Valters Brusbardis, Jean-Daniel Charrière, Robert Chlebo, Mary F. Coffey, Karl Crailsheim, Bjørn Dahle, Jiří Danihlík, Ellen Danneels, Dirk C. de Graaf, Marica Maja Dražić, Mariia Fedoriak, Ivan Forsythe, Miroljub Golubovski, Ales Gregorc, Urszula Grzęda, Ian HubbuckRahşan İvgin Tunca, Lassi Kauko, Ole Kilpinen, Justinas Kretavicius, Preben Kristiansen, Maritta Martikkala, Raquel Martín-Hernández, Franco Mutinelli, Magnus Peterson, Christoph Otten, Aslı Ozkirim, Aivar Raudmets, Noa Simon-Delso, Victoria Soroker, Grazyna Topolska, Julien Vallon, Flemming Vejsnæs, Saskia Woehl

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)
23 Downloads (Pure)


In this short note we present comparable loss rates of honey bee colonies during winter 2015/16 from 29 countries, obtained with the COLOSS questionnaire. Altogether, we received valid answers from 19,952 beekeepers. These beekeepers collectively wintered 421,238 colonies, and reported 18,587 colonies with unsolvable queen problems and 32,048 dead colonies after winter. This gives an overall loss rate of 12.0% (95% confidence interval 11.8%-12.2%) during winter 2015/16, with marked differences among countries. Beekeepers in the present study assessed 7.6% (95% CI 7.4%-7.8%) of their colonies as dead or empty, and 4.4% (95% CI 4.3%-4.5%) as having unsolvable queen problems after winter. The overall analysis showed that small operations suffered higher losses than larger ones. A table with detailed results and a map showing response and relative risks at regional level are presented.
Original languageEnglish
Pages (from-to)375-378
Number of pages4
JournalJournal of Apicultural Research
Issue number5
Early online date2 Dec 2016
Publication statusPublished - 31 Dec 2016


  • Apis mellifera
  • apiculture
  • colony loss
  • monitoring
  • winter survival
  • beekeeping
  • survey
  • citizen science


Dive into the research topics of 'Preliminary analysis of loss rates of honey bee colonies during winter 2015/16 from the COLOSS survey'. Together they form a unique fingerprint.

Cite this