Longest mammal migration
Who
Humpback whale
What
8200 kilometre(s)
Where
()

The longest migration undergone by any mammal species is that of the humpback whale (Megaptera novaeangliae), which migrates up to 8200 km each way when journeying back and forth between its warm breeding waters near the equator and the colder food-rich waters of the arctic and antarctic regions.