It may take two to make a baby - but not necessarily two to bring it up. So what makes a parent decide to stay or go? From the Adelie penguin parents who can't leave their eggs alone for five minutes and flamingo parents both producing milk for their young, to cheetah mums practicing promiscuity to keep the dads on side-we see just how far these incredible parents go in order to protect and nurture as many offspring as possible through to adulthood.

Originally released by BBC, 2015. Streaming video file encoded with permission for digital streaming by Infobase on May 22, 2019.

Seasonal Family (4:16); --Swimming Seabirds (4:06); -- Drained Parents (2:31); -- Discriminating Dad (6:39); -- Paternity Question (4:56); -- Mostly Monogamous (7:48); -- Guaranteeing Paternity (2:45); -- Unconventional Amphibian Incubation (5:25); -- Harem Maintenance (4:40); -- Devoted Father (5:26); -- Credits: Animal Super Parents: It Takes Two (0:29); .