Which statement best describes Arctic tern migration?

• A. Migrate only within Arctic Circle
• B. Do not migrate; stay year-round
• C. Migrate from tropics to temperate zones
• D. From Arctic to Antarctic yearly

Answer: (D)

Arctic terns undertake the longest regular migration of any animal, moving each year from Arctic breeding grounds to the Antarctic and back. This pole-to-pole pattern means they spend summers near the Arctic rim and winters near Antarctica, effectively traveling from Arctic to Antarctic yearly. That description captures their true travel route and the scale of their migration. The idea of staying in one place, or staying only within the Arctic, or moving from tropical regions to temperate zones, doesn’t fit the globe-spanning voyage these birds routinely make.