by David Attenborough ; a BBC TV production in association with Australian Broadcasting Corporation, Turner Broadcasting System Inc. ; BBC Bristol ; executive producer, Peter Jones
Roadside Attractions ; The National Film Board of Canada presents ; a film by Sarah Polley ; produced by Anita Lee ; written and directed by Sarah Polley
Participant Media presents ; a Catalyst Films/Silverbush production ; a Lori Silverbush/Kristi Jacobson film ; produced by Julie Goldman, Ryan Harrington ; produced and directed by Kristi Jacobson and Lori Silverbush
a presentation by Aubin Pictures ; in association with Rise Up Foundation ; a film by Catherine Gund, Sadie Hope-Gund and Safiyah Riddle ; directed by Catherine Gund ; producers, Catherine Gund, Tanya Selvaratnam ; co-producers, Sadie Rain Hope-Gund and Safiyah Kai Riddle