Herb Wilson, Leslie Brainerd Arey Professor of Biosciences, discusses the history of human understanding of bird migration. According to Wilson, ancient Greek myths of hibernation and transformation were the accepted explanations of the disappearance of birds in winter until the 18th century, when people first began recording seasonal arrival dates of certain species and subsequently published their findings. Observers shared their information and were able to trace the group migration patterns of birds with their combined data. Scientists then began developing tactics for individual identification, such as banding and satellite transmitters.