Promo DVD from the Daily Mail in association with the BBC in 2007
The DVD is in a card sleeve and will be put in a clear sleeve to protect it in transit
(if buying from outside Region 2: Europe, Japan, Middle East, please ensure your DVD player is capable of playing multiregion disks)
THE DAVID ATTENBOROUGH WILDLIFE COLLECTION
THE LIFE OF BIRDS - THE MASTERY OF FLIGHT
This second programme deals with the mechanics of flight. Getting into the air is by far the most exhausting of a bird's activities, and Attenborough observes shearwaters in Japan that have taken to climbing trees to give them a good jumping-off point. The albatross is so large that it can only launch itself after a run-up to create a flow of air over its wings. A combination of aerodynamics and upward air currents (or thermals), together with the act of flapping or gliding is what keeps a bird aloft. Landing requires less energy but a greater degree of skill, particularly for a big bird, such as a swan. Weight is kept to a minimum by having a beak made of keratin instead of bone, a light frame, and a coat of feathers, which is maintained fastidiously. The peregrine falcon holds the record for being fastest in the air, diving at speeds of over 300 km/h. Conversely, the barn owl owes its predatory success to flying slowly, while the kestrel spots its quarry by hovering. However, the true specialists in this regard are the hummingbirds, whose wings beat at the rate of 25 times a second. The habits of migratory birds are explored. After stocking up with food during the brief summer of the north, such species will set off on huge journeys southwards. Some, such as snow geese, travel continuously, using both the stars and the sun for navigation. They are contrasted with hawks and vultures, which glide overland on warm air, and therefore have to stop overnight.
Region 2: Europe etc PAL
Cert: UK: E (exempt from classification)
Audio: English (stereo, Dolby digital)
Running time 49 minutes
Aspect ratio: 4:3 Full screen
Subtitles: English for the hard of hearingCopyright 2006 BBC Worldwide Ltd
The DVD is in mint condition
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