Porcupine Caribou Herd
The Porcupine caribou herd, with nearly 200,000 animals, migrates through Alaska's Arctic and Canada's adjacent Vuntut and Ivvavik National Parks, flowing like a river of animals across the expansive coastal plain, through U-shape valleys and alpine meadows, and over high mountain passes. These migration routes demonstrate the interconnected nature of the region's lands and waters, and how arbitrary human boundaries seem.