Biology
Energetic constraints on long-distance migration in bar-tailed godwits
Quick fact
A bar-tailed godwit can fly over 11,000 km nonstop across the Pacific, losing about 55% of its body weight in fat fuel, yet it loses little muscle, allowing it to take off again after refueling.
Why this is interesting
Imagine flying nonstop from New York to Sydney—without eating, drinking, or sleeping. That's what a bar-tailed godwit does every year, but how does it survive?