[music playing]
[hummingbird twitter]
This male booted racket-tail hummingbird lives
on the brink of starvation.
Just two hours without nectar, and he could die.
Hummingbirds have the fastest metabolisms on Earth.
Some need to visit 2,000 flowers a day just to keep going.
This mountainous forest is one of the few jungles
that is getting wetter.
Heavy rain is predicted to increase.
And when you weigh less than a nickel,
raindrops are a bombardment.
Waterlogged feathers slow his progress.
Staying airborne becomes more demanding.
But he's running on empty, and the clock is ticking.
[music playing]