J. Degen: moths use patterns of light in sky for orientation - when moon is up, they orient better. Used harmonic radar to measure tiny antenna onto backs of moths and measure flight paths very accurately. Released moths in center of 6 streetlights 85m apart. Caught moths each night to measure, many different species.

Moths got stuck inside circle of streetlights unless moon was up. Flights are more tortuous/curvy when streetlights on.

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