In suburban monitoring, big moths were only a partial proxy for the smaller ones
WHAT THE EVIDENCE SAYS
Two light traps sampled suburban sites near Basel over six years, with one relocated in the final year. Researchers identified 17,404 moths representing 515 species. Annual samples of larger moths, especially noctuids, moderately predicted smaller-moth diversity, while geometrids were not dependable surrogates and weekly predictions were weaker and season-dependent.
WHY IT MATTERS / OUR READ
City biodiversity dashboards are most useful when their 'indicator species' assumption is tested. Selecting one tractable group can save monitoring effort, but proxy relationships may vary by season and different neighborhoods.
CAVEATS / UNCERTAINTY
The study sampled two traps across three locations, not all urban habitats or insect groups. Site relocation, weather, phenology and identification effort constrain transferability; moderate association is not full community coverage.
SOURCE
Schmera et al. · Biodiversity and Conservation · suburban moth monitoring
View original evidence ↗
Six years of Swiss light traps show why a shortcut to urban biodiversity depends on taxon and time scale.
Read the Wild Lands assessment →