THE LATEST NEWS and advice on fly fishing, fly fishing gear, fly fishing trips, and fly fishing books and media.Trout Have Built-In Compasses
Researchers in New Zealand have discovered tiny crystals in the noses of trout that allow them to sense changes in magnetic fields, perhaps explaining how trout can tell direction. "The tiny crystals are made of magnetite, an oxide of iron that has magnetic properties. The crystals are linked to individual receptor cells in the brain, allowing the trout to sense changes in magnetic fields." Magnetic nymphs, anyone? Matt McGrath of the BBC. (Thanks to reader Robert Huber for this link.)
