Additional photography, Jamie McPherson ; film editor, Kelly Morris ; composer, Tobin Stokes.
Jeff Turner.
Originally produced in 2012 and broadcast by PBS on the television program Nature on Feb. 13, 2013.
DVD, region 1, widescreen presentation; Dolby Digital stereo.
English subtitles for the deaf and hard of hearing.
Described in English for people with visual disabilities.
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