Extras
A flock is one of the most spectacular sights in nature 鈥� but how does it work?
Every night an arms race is played out between bats and moths for domination of the sky.
The Brazilian free-tailed bat is one of the most versatile flyers in the animal kingdom.
Albatross are masters of low cost, longhaul travel, using the power of the wind to fly.
To keep their huge bodies airborne, these beetles twist their wings for extra thrust.
The jumbo jet of the bird world needs a runway and carefully applied power.
Flying squirrels can find food fast in winter and short flights help them avoid owls.
For kangaroos, hopping is key to the most efficient form of locomotion on land.
It鈥檒l be two weeks before they can fly. They have to jump for it.
Caracals are adapted to catch birds in flight and capable of leaping up to 3m high.