The animal known to have the longest migration route is the Arctic tern. This remarkable bird migrates annually between its breeding grounds in the Arctic and its wintering grounds in the Antarctic, covering an impressive distance of approximately 70,000 kilometers (43,500 miles) round-trip. The Arctic tern is celebrated for its incredible endurance and navigation skills, often making the longest migration of any animal on the planet. This journey allows the tern to experience two summers a year, maximizing its feeding opportunities and breeding success across diverse habitats and climate conditions.