Researchers report that citizen science observations are helping clarify how parental care evolved in harvestmen spiders (order Opiliones). The study, published in the Zoological Journal of the Linnean Society, uses data collected through iNaturalist, a public platform that allows people to record observations of living organisms. By analyzing these records, the researchers examine patterns of parental guarding—behavior in which a parent remains with offspring or potential young—across different cases and contexts. The findings are presented as evidence for the evolutionary development of such guarding behavior, linking observed natural history patterns to broader questions about how parental care traits emerge and change over time. The work highlights how large-scale, real-world data gathered by non-specialists can support scientific studies of animal behavior that are otherwise difficult to document comprehensively. Overall, the article emphasizes the contribution of iNaturalist to behavioral research, while the scientific conclusions are framed within the evolutionary history of parental care in harvestmen.