The control of migration, its timing and response are genetically controlled and appear to be a primitive trait that is present even in non-migratory species of birds. The ability to navigate and orient themselves during migration is a much more complex phenomenon that may include both endogenous programs as well as learning.
వలస వెళ్ళని పక్షులలో కూడా ఉన్న ఆదిమ లక్షణం ఏమిటి?
migration