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 …

Globally, agriculture has intensified during the past 50 years due to increased
mechanization, changes in the timing of farming operations, grassland conversion to …

Aerial insectivores (birds that forage on aerial insects) have experienced significant
population declines in North America. Numerous hypotheses have been proposed for these …

Farmers in most western countries have increased use of fertilizer and pesticides with
impact on wild animals and plants, including the abundance of insects and their predators. I …

Ecologists studying bird foraging ecology have generally focused on food quantity over
quality. Emerging work suggests that food quality, in terms of highly unsaturated omega‐3 …

Although we have known anecdotally that insects have been declining in Great Britain for
more than 100 years, insect declines have only been statistically estimated over the last 20 …

Identifying the composition of avian diets is a critical step in characterizing the roles of birds
within ecosystems. However, because birds are a diverse taxonomic group with equally …

North American birds that feed on flying insects are experiencing steep population declines,
particularly long-distance migratory populations in the northern breeding range. We …

The biodiversity of insects is threatened worldwide. Numerous studies have reported the
serious decline in insects that has occurred in recent decades. The same is happening with …

Many animal species exhibit spatiotemporal synchrony in population fluctuations, which may
provide crucial information about ecological processes driving population change. We …