ArticleProceedings. Biological sciences2024
The most remarkable migrants-systematic analysis of the Western European insect flyway at a Pyrenean mountain pass.
Article in Proceedings. Biological sciences, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Long-range pollen transport across the North Sea: Insights from migratory hoverflies landing on a remote oil rig.The Journal of animal ecology · 2025Article
- Lords of the flies: dipteran migrants are diverse, abundant and ecologically important.Biological reviews of the Cambridge Philosophical Society · 2025Review
- Active navigation and meteorological selectivity drive insect migration patterns through the Levant.Proceedings. Biological sciences · 2025Article
- Climate change is leading to an ecological trap in a migratory insect.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Migrating hoverflies as potential food source for co-migrating insectivorous birds.Royal Society open science · 2025Article
- Multiple factors contribute to female dominance in migratory bioflows.Open biology · 2025Article
- Millions of insects migrate across the Pyrenees: heavy transit and conflicting ecological roles.Proceedings. Biological sciences · 2025Article
- Enhanced flight performance in hoverfly migrants.iScience · 2024Article
Corrections and comments
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Authors and funding
10 authors.
Funding
Abstract
In autumn 1950 David and Elizabeth Lack chanced upon a huge migration of insects and birds flying through the Pyrenean Pass of Bujaruelo, from France into Spain, later describing the spectacle as combining both grandeur and novelty. The intervening years have seen many changes to land use and climate, posing the question as to the current status of this migratory phenomenon. In addition, a lack of quantitative data has prevented insights into the ecological impact of this mass insect migration and the factors that may influence it. To address this, we revisited the site in autumn over a 4 year period and systematically monitored abundance and species composition of diurnal insect migrants. We estimate an annual mean of 17.1 million day-flying insect migrants from five orders (Diptera, Hymenoptera, Hemiptera, Lepidoptera and Odonata) moving south, with observations of southward 'mass migration' events associated with warmer temperatures, the presence of a headwind, sunlight, low windspeed and low rainfall. Diptera dominated the migratory assemblage, and annual numbers varied by more than fourfold. Numbers at this single site hint at the likely billions of insects crossing the entire Pyrenean mountain range each year, and we highlight the importance of this route for seasonal insect migrants.
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