* Territorial size can vary: It depends on factors like food availability, competition, and season.
* Defining "territory" can be tricky: Do we mean a core area where they live and breed, or a wider range they travel through?
However, some strong contenders for having the largest average territory include:
* Whale sharks: These gentle giants roam vast oceans, often covering thousands of miles in their migrations.
* Blue whales: Also massive ocean wanderers, their territories can span hundreds of miles.
* Albatrosses: These seabirds have some of the largest ranges of any bird, sometimes covering millions of square kilometers.
Ultimately, it's hard to give a single definitive answer. The size and scope of an animal's territory are constantly in flux, and it depends on how we define "territory" in the first place.