Daylight Sensors Used for Mapping

By simply logging daylight exposure, then cross referencing that data with known sunrise/sunset times, Dr. Bridget Stutchbury, of York University in Toronto, was able to generate accurate maps of previously uncharted songbird migrations.

Listen to, or download, an interview with Dr. Stutchbury in mp3 or ogg format.

(Via CBC Radio | Quirks & Quarks | February 14, 2009.)