○○○ metabolism ⪢⪢
This male booted
racket-tailed hummingbird lives on the brink of starvation. Just 2 hours without nectar and he could die. Humming birds have the fastest metabolisms on Earth. Some need to visit 2 thousand flowers a day just to keep going.
http://qindex.info/i.php?x=15340
• rack ⪢⪢
