Severe decline in terrestrial insect species richness, abundance, flying biomass, and local
extinctions across Europe are cause for alarm. Here, we summarize this decline, and identify …

Biodiversity of insects is threatened worldwide. Here, we present a comprehensive review of
73 historical reports of insect declines from across the globe, and systematically assess the …

Global declines in insects have sparked wide interest among scientists, politicians, and the
general public. Loss of insect diversity and abundance is expected to provoke cascading …

Policy‐makers increasingly demand robust measures of biodiversity change over short time
periods. Long‐term monitoring schemes provide high‐quality data, often on an annual …

Many publications documenting large‐scale trends in the distribution of species make use of
opportunistic citizen data, that is, observations of species collected without standardized …

1. Sown wildflower strips are increasingly being established in European countries within
agri‐environmental schemes to enhance biodiversity, especially in intensively used …

Opportunistic butterfly records from 1890 to 2017 were analysed to quantitatively estimate
the overall long-term change in occurrence of butterfly species in the Netherlands. For 71 …

Protected areas are a key conservation tool, yet their effectiveness at maintaining
biodiversity through time is rarely quantified. Here, we assess protected area effectiveness …

Landscape simplification and habitat fragmentation may cause severe declines of less
mobile and habitat specialist species and lead to biotic homogenization of species …

This study provides a novel systematic comparative analysis of the species characteristics
affecting the range margin shifts in butterflies towards higher latitudes, while taking …