David Attenborough Presents: Hummingbirds - Jewelled Messengers | Free Documentary Nature

David Attenborough Presents: Hummingbirds - Jewelled Messengers | Nature Documentary Watch 'Birds of Passage - A Secret Journey Through the Skies' here: https://youtu.be/0I-2C5fulCw This is the story of how hummingbirds became the ultimate creatures of the air. Hummingbirds live at the limits of what is possible. They have the highest metabolism – with a heart rate of 1,200 beats per minute – of any vertebrate. Their wings beat 50 times a second. They can hover on the spot, and even fly backwards. To our eyes, they are just a blur. But with the aid of high-speed cameras we can slow down their hyperactive lives and look into their secret world. It is a world of great beauty, full of colour and balletic flight. They are the most remarkable creatures to ever grace our planet. This film, with never-seen-before sequences, reveals them in a new light. ▬▬▬▬▬▬▬▬▬ Subscribe Free Documentary - Nature Channel for free: http://bit.ly/2mFDC3Q Facebook: https://bit.ly/2QfRxbG Twitter: https