David Attenborough's Natural Curiosities, Series 1, Episode 4, A Curious Twist
directed by Stephen Dunleavy, fl. 2000; presented by David Attenborough, 1926-; produced by Stephen Dunleavy, fl. 2000, Humble Bee Films and Eden, in David Attenborough's Natural Curiosities, Series 1, Episode 4 (London, England: BBC Worldwide, 2013), 25 mins