Postprint version. Published in Science, Volume 218, Issue 4573, November 12, 1982, pages 695-697. Copyright © 1982 American Association for the Advancement of Science. The definitive version is available at http://dx.doi.org/10.1126/science.218.4573.695.
NOTE: At the time of publication, the author Richard B. Frankel was not yet affiliated with Cal Poly.
Honey bees are sensitive to earth strength magnetic fields and are reported to contain magnetite (Fe3O4) in their abdomens. We report bands of cells around each abdominal segment that contain numerous electron-opaque, iron-containing granules. The iron is principally in the form of hydrous iron oxides.