More than 75 percent decline over 27 years in total flying insect biomass in protected areas

• Caspar A. Hallmann ,

  Roles Conceptualization, Formal analysis, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: c.hallmann@science.ru.nl

  Affiliation Radboud University, Institute for Water and Wetland Research, Animal Ecology and Physiology & Experimental Plant Ecology, PO Box 9100, 6500 GL Nijmegen, The Netherlands

  http://orcid.org/0000-0002-4630-0522

  ⨯
• Martin Sorg,

  Roles Conceptualization, Data curation, Funding acquisition, Investigation, Methodology, Resources, Writing – review & editing

  Affiliation Entomological Society Krefeld e.V., Entomological Collections Krefeld, Marktstrasse 159, 47798 Krefeld, Germany

  ⨯
• Eelke Jongejans,

  Roles Conceptualization, Funding acquisition, Investigation, Supervision, Writing – review & editing

  Affiliation Radboud University, Institute for Water and Wetland Research, Animal Ecology and Physiology & Experimental Plant Ecology, PO Box 9100, 6500 GL Nijmegen, The Netherlands

  ⨯
• Henk Siepel,

  Roles Conceptualization, Investigation, Supervision, Writing – review & editing

  Affiliation Radboud University, Institute for Water and Wetland Research, Animal Ecology and Physiology & Experimental Plant Ecology, PO Box 9100, 6500 GL Nijmegen, The Netherlands

  ⨯
• Nick Hofland,

  Roles Formal analysis, Resources, Software, Validation

  Affiliation Radboud University, Institute for Water and Wetland Research, Animal Ecology and Physiology & Experimental Plant Ecology, PO Box 9100, 6500 GL Nijmegen, The Netherlands

  ⨯
• Heinz Schwan,

  Roles Data curation, Funding acquisition, Investigation, Methodology, Project administration, Writing – review & editing

  Affiliation Entomological Society Krefeld e.V., Entomological Collections Krefeld, Marktstrasse 159, 47798 Krefeld, Germany

  ⨯
• Werner Stenmans,

  Roles Data curation, Funding acquisition, Methodology, Project administration, Writing – review & editing

  Affiliation Entomological Society Krefeld e.V., Entomological Collections Krefeld, Marktstrasse 159, 47798 Krefeld, Germany

  ⨯
• Andreas Müller,

  Roles Data curation, Project administration, Resources, Writing – review & editing

  Affiliation Entomological Society Krefeld e.V., Entomological Collections Krefeld, Marktstrasse 159, 47798 Krefeld, Germany

  ⨯
• Hubert Sumser,

  Roles Data curation, Investigation, Methodology, Resources, Writing – review & editing

  Affiliation Entomological Society Krefeld e.V., Entomological Collections Krefeld, Marktstrasse 159, 47798 Krefeld, Germany

  ⨯
• Thomas Hörren,

  Roles Data curation, Investigation, Methodology, Resources, Writing – review & editing

  Affiliation Entomological Society Krefeld e.V., Entomological Collections Krefeld, Marktstrasse 159, 47798 Krefeld, Germany

  ⨯
• Dave Goulson,

  Roles Conceptualization, Investigation, Writing – review & editing

  Affiliation University of Sussex, School of Life Sciences, Falmer, Brighton BN1 9QG, United Kingdom

  ⨯
• Hans de Kroon

  Roles Conceptualization, Funding acquisition, Investigation, Methodology, Resources, Supervision, Writing – review & editing

  Affiliation Radboud University, Institute for Water and Wetland Research, Animal Ecology and Physiology & Experimental Plant Ecology, PO Box 9100, 6500 GL Nijmegen, The Netherlands

  ⨯