
Nigel Marven heads to the coastline to track grey whales on their journey to their summer feeding grounds. This 5,000-mile journey takes the whales up North America's Pacific coast, from Mexico to Alaska.
Nigel Marven heads to the coastline to track grey whales on their journey to their summer feeding grounds. This 5,000-mile journey takes the whales up North America's Pacific coast, from Mexico to Alaska.