Insect declines are being reported worldwide for flying, ground, and aquatic lineages. Most
reports come from western and northern Europe, where the insect fauna is well-studied and …

Insect populations including butterflies are declining worldwide, and they are becoming an
urgent conservation priority in many regions. Understanding which butterfly species migrate …

Recent regional reports and trends in biomonitoring suggest that insects are experiencing a
multicontinental crisis that is apparent as reductions in abundance, diversity, and biomass …

In recent decades, entomologists have documented alarming declines in occurrence,
taxonomic richness, and geographic range of insects around the world. Additionally, some …

Large-scale biodiversity changes are measured mainly through the responses of a few
taxonomic groups. Much less is known about the trends affecting most invertebrates and …

1. Insects have emerged as causes célèbres for widespread concern about human effects
on global biodiversity. Here, we consider how insects provide opportunities both to …

1. Population declines among insects are inadequately quantified, yet of vital importance to
national and global biodiversity assessments and have significant implications for …

Climate change is expected to increase the frequency of some climatic extremes,. These
may have drastic impacts on biodiversity,, particularly if meteorological thresholds are …

We review changes in the status of butterflies in Europe, focusing on long-running
population data available for the United Kingdom, the Netherlands, and Belgium, based on …

Species' distributions are likely to be affected by a combination of environmental drivers. We
used a data set of 11 million species occurrence records over the period 1970–2010 to …