ArticleEcology and evolution2019
Parallel declines in abundance of insects and insectivorous birds in Denmark over 22 years.
Article in Ecology and evolution, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It has been retracted, and should not be counted. Cited by 42 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
42 citing papers in PubMed, 130 citations in OpenAlex.
- Distance to central-place drives species-specific habitat selection in sympatric insectivorous birds.Movement ecology · 2026Article
- RETRACTION: Parallel Declines in Abundance of Insects and Insectivorous Birds in Denmark Over 22 Years.Ecology and evolution · 2026Article
- Insect education and outreach: integrating traditional and non-lethal collection techniques.Journal of insect science (Online) · 2026Review
- Cross-ecosystem linkages between freshwater insects and riparian birds across the USA.Nature ecology & evolution · 2026Article
- Many small climate change impacts presage rapid population extinction in a common iconic bird.Nature communications · 2026Article
- Novel Non-Invasive Biomonitoring Using Avian Faecal Sacs Reveals Dependence of Pesticide Exposure on Field Distance.Toxics · 2026Article
- Invertebrate community composition in dominant agroecosystems of Saskatchewan, Manitoba, and North Dakota.Annals of the Entomological Society of America · 2026Article
- The economic, agricultural, and food security repercussions of a wild pollinator collapse in Europe.Nature communications · 2025Article
- Trait mediation explains decadal distributional shifts for a wide range of insect taxa.Nature communications · 2025Article
- Analysis of the evidence to support the definition of specific protection goals for terrestrial organisms-Part 1: Proposed strategy.EFSA journal. European Food Safety Authority · 2025Article
- Data of the Insect Biome Atlas: a metabarcoding survey of the terrestrial arthropods of Sweden and Madagascar.Scientific data · 2025Article
- Reduced Body Mass in a Highly Insectivorous Mammal, the Garden Dormouse-Ecological Consequences of Insect Decline?Ecology and evolution · 2025Article
- Combining radio-telemetry and radar measurements to test optimal foraging in an aerial insectivore bird.eLife · 2025Article
- Barn swallows and purple martins convert precursors to long-chain polyunsaturated fatty acids: implications for conservation of riparian- vs inland-nesting habitats.Conservation physiology · 2025Article
- Evidence for bottom-up effects of moth abundance on forest birds in the north-boreal zone alone.Ecology letters · 2024Article
- Space-for-time substitutions exaggerate urban bird-habitat ecological relationships.The Journal of animal ecology · 2024Article
- Migratory birds modulate niche tradeoffs in rhythm with seasons and life history.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- The sound of science : Data sonification has emerged as possible alternative to data visualization.EMBO reports · 2024Article
- Landscape structure and site characteristics influence whether the northern house martinEcology and evolution · 2024Article
- Food availability aligns with contrasting demographics in populations of an at-risk songbird.Ecology and evolution · 2024Article
Corrections and comments
- Retraction · 2026-06-11Author Unresponsive · Concerns/Issues about Data · Duplication of Data · Investigation by Journal/Publisher · Investigation by Third Party ·
- Retracted
Authors and funding
1 author at 1 institution in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
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 used 1,375 surveys of insects killed on car windscreens as a measure of insect abundance during 1997-2017 at two transects in Denmark. I cross-validated this method against three other methods for sampling insect abundance, and I investigated the effects of this measure of insect abundance on the abundance of breeding insectivorous birds.The abundance of flying insects was quantified using a windscreen resulting in reductions of 80% and 97% at two transects of 1.2 km and 25 km, respectively, according to general additive mixed model. Insect abundance increased with time of day, temperature, and June date, but decreased with wind resulting in a reduction by 54%. The abundance of insects killed on a car windscreen was strongly positively correlated with the abundance of insects caught in sweep nets and on sticky plates in the same study areas and at the same time as when insects were sampled using windscreens. The decline in abundance of insects on windscreens predicted the rate at which barn swallows
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