![](/nationalgeographic/adventurer_october_2018/the_magic_behind_their_movement/204168/.Bg_vid.mp4.2048_0_1.jpg)
ByBrennaMaloney
Atanymomentintheworld,millionsofanimalsareonthemove.Buthowdotheyknowwhere,when,andhowtogo?
Wildlife
LifeScience
Asyouread,makealistofthemechanismsthattriggerananimal's migration.
ByBrennaMaloney
Atanymomentintheworld,millionsofanimalsareonthemove.Buthowdotheyknowwhere,when,andhowtogo?
Asyouread,makealistofthemechanismsthattriggerananimal's migration.