Migrating horses Source/credit: Beverly Joubert What am I looking at? These migrating horses are actually shadows of zebras. The stripes do work well as camouflage. However, the morning sunlight over the Makgadikgadi pans in Botswana casts long, visible shadows. More optical illusions:Cross-stitch CatsDock to the skyAmish Men using a TruckSexy BirchFlying catMysterious treeCat defies gravityWolf pack