For Evolution, Monarch Butterfly Migration Is a Mystery
animal behavior, antennae, biology, butterflies, Canada, circadian clock, compound eyes, Danaus plexippus, Evolution, genomes, Intelligent Design, latitude, magnetic compass, Mexico, migration, milkweed, monarch butterfly, navigation, neurobiology, Stonehenge, sun compass, United States
It typically takes up to three generations of butterflies to make the complete journey. This means that the navigation information is genetically programmed. Source