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This movement resembles the correlated random-walk pattern seen in microorganisms such as Escherichia coli. Previous studies have primarily focused on limb adaptations and biomechanics, leaving the ecological significance inadequately addressed. We combine field observations with controlled laboratory experiments using a flow mill to investigate the dynamics of R. oriander under typical flow conditions. Our findings indicate that this insect exhibits a two-dimensional run-and-tumble motion, often incorporating lateral tumbles following straight runs (run distance: $30.7\\pm 9.3$ mm). We find that this behavior is resilient to changes in flow speed. In-silico simulations of particle interception demonstrated that this locomotion method enhances encounter rates compared to linear movement, particularly when the simulated food particle is following a rapid flow field. Our results document run-and-tumble locomotion in a millimeter-scale organism, showcasing a unique example of convergent behavior across diverse taxonomic groups and providing valuable insights into locomotion ecology while serving as a source of inspiration for bioinspired robotics and environmental exploration algorithms.<\/jats:p>","DOI":"10.1093\/icb\/icaf110","type":"journal-article","created":{"date-parts":[[2025,6,19]],"date-time":"2025-06-19T07:55:05Z","timestamp":1750319705000},"page":"1714-1723","source":"Crossref","is-referenced-by-count":0,"title":["Rhagovelia Uses Interfacial Run-and-Tumble Locomotion to Improve Food Capture in Flowing Environments"],"prefix":"10.1093","volume":"65","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0250-757X","authenticated-orcid":false,"given":"Ishant","family":"Tiwari","sequence":"first","affiliation":[{"name":"School of Chemical and Biomolecular Engineering, Georgia Institute of Technology , Atlanta, GA-30332-0100 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