Credits

New Caldedonia reefs via satellite, May 10, 2001 (USGS; satellite: NASA Landsat 7, sensor: ETM+)

New Caledonia reefs photo (© IUCN - Dan Laffoley)

Central Mexico, 21 March 2000 and January 16, 2003 (mosaic) (Global Land Cover Facility; satellite: NASA Landsat 7, sensor: ETM+)

Lomas de Aparicio, Mexico, March 22, 2004 and February 23, 2008 (IKONOS satellite image courtesy of GeoEye; www.geoeye.com)

Clustering monarchs (University of Kansas)

Migrating monarchs (Lincoln Brower)

Lake Tengiz, Kazakhstan, May 1, 2001, (Global Land Cover Facility; satellite: NASA Landsat 7, sensor: ETM+)

Saryarka steppe and lakes photo (© IUCN - Chris Magin)