Masters of the Sky

S1, E2: We are up and away with the world of powered flight - revealing why peregrine falcons can top 200 miles an hour and how a hummingbird is a slave to its own rather manic lifestyle. Then there are heavyweight beetles breaking the rules to find love, a devious sparrow-hawk who uses agility to execute a lightning fast raid on his prey, and half a million mother bats who dominate the sky above - and below the ground - with a dazzling display of aerial prowess.