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.
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 .
What does reverse migration lead to?
What does reverse migration lead to ?
rarities turning up as vagrants thousands of kilometres out of range
rarities turning up as vagrants thousands of kilometres out of range