Reverse migration, where the genetic programming of young birds fails to work properly, can lead to rarities turning up as vagrants thousands of kilometres out of range. COUNT 4
QSN1 What is it called when the genetic programing of young birds fail? ANS1 Reverse migration QSN2 What is reverse migration? ANS2 where the genetic programming of young birds fails to work properly QSN3 What does reverse migration lead to? ANS3 rarities turning up as vagrants thousands of kilometres out of range QSN4 How far out of range can rarities get? ANS4 thousands of kilometres