"Subtitles are a function of the disc and serve the same purpose as closed captions. Described video (for the visually impaired) is available as a secondary audio track"--Container.
Originally produced as an episode of the television series: Nature.
Program content: ©2017.
Widescreen.
Running time indicated on container: 60 minutes; program running time: 53 minutes.
Editor, Neil Stacey ; photography, Mark MacEwen, Rod Clarke, Justin Maguire, Hugh Miller, John Brown, Kevin Flay, Peter Nearhos.
Narrator, Allan Peck.
Originally broadcast on the PBS Network on November 22, 2017.
DVD; NTSC, Region 1; widescreen presentation; 5.1 surround.
In English, with optional English subtitles; descriptive audio.
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