Series 1 Episode 4
8PM Sun 29 June 2014

Joy and Mark investigate the reproductive secrets of marine mammals. How do animals that breathe air manage to mate, give birth and raise their young underwater?

Joy travels to New Zealand to uncover the mating strategy of dusky dolphins. These acrobats of the sea form mating groups that leap from the water in perfect unison.

Males pursue females in a dramatic high-speed chase then, swimming upside down, rapidly mate with the female, with copulation lasting just two seconds!

Joy reveals the incredible adaptations marine mammals have evolved to mate in the ocean, from the extraordinary looping penis of the dolphin to the even weirder folded vagina of the harbour porpoise in San Francisco. She also explores the difficulties of breastfeeding underwater.

Meanwhile, Mark travels to Mexico to find out why whales travel 12,000 miles to mate and how whale young avoid the most ruthless predators in the ocean - killer whales.

The programme witnesses a remarkable dolphin birth and finds out why dolphins are born tail-first.

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    1. Born in the Wild Sun 29 Jun 2014 Dolphin 3 days left

      Episode 4:  Joy and Mark investigate the reproductive secrets of marine mammals. How do animals that breathe air manage to…

      • This episode has subtitles available.
      Watch the intro to Born in the Wild - Sun 29 Jun 2014 clips
      1. S1-Ep4: Mating Dolphins This video is a intro S1-Ep4: Mating Dolphins Video duration: 2:41 minutes

        Examining the mating rituals of dolphins
      2. S1-Ep4: Grey Whale Biopsy This video is a extra S1-Ep4: Grey Whale Biopsy Video duration: 1:58 minutes

        Mark's in Mexico trying to get to the bottom of the Grey Whale's sex life
      3. S1-Ep4: Mating Dolphins This video is a extra S1-Ep4: Mating Dolphins Video duration: 2:41 minutes

        We follow the mating rituals of Dusky Dolphins
    1. Born in the Wild Dolphin Episode 4 3 days left

      Joy and Mark investigate the reproductive secrets of marine mammals. How do animals that breathe air manage to mate…

      • This episode has subtitles available.
      Watch the intro to Born in the Wild - Dolphin clips
      1. S1-Ep4: Mating Dolphins This video is a intro S1-Ep4: Mating Dolphins Video duration: 2:41 minutes

        Examining the mating rituals of dolphins
      2. S1-Ep4: Grey Whale Biopsy This video is a extra S1-Ep4: Grey Whale Biopsy Video duration: 1:58 minutes

        Mark's in Mexico trying to get to the bottom of the Grey Whale's sex life
      3. S1-Ep4: Mating Dolphins This video is a extra S1-Ep4: Mating Dolphins Video duration: 2:41 minutes

        We follow the mating rituals of Dusky Dolphins
    1. Born In The Wild: A Baby Elephant Enters The World This video is a extra Born In The Wild: A Baby Elephant Enters The World Video duration: 3:04 minutes

      Anatomist Dr. Joy Reidenberg takes us through an amazing moment under the cover of darkness - the culmination of a nearly two year long pregnancy, the birth of a baby elephant.
    2. Born In The Wild: How To Get A Semen Sample From An Elephant This video is a extra Born In The Wild: How To Get A Semen Sample From An Elephant Video duration: 3:23 minutes

      Vet Mark Evans journeys out into the wilds of South Africa with a team led by Dr. Imke Luders, as they collect semen samples to test the results of a new elephant contraceptive, designed to help reduce the culling of key elephant populations.
      • The programme isn't suitable for younger viewers
    3. S1-Ep2: Kangaroo Birth This video is a intro S1-Ep2: Kangaroo Birth Video duration: 2:51 minutes

      Alice's tiny newborn baby crawls up her fur into her pouch
    4. S1-Ep2: Orphans at Uralla This video is a clip S1-Ep2: Orphans at Uralla Video duration: 0:45 minutes

      Anatomist Joy Reidenberg learns how to care for baby kangaroos at the Uralla sanctuary
    5. S1-Ep3: A Baby Orangutan Enters the World This video is a intro S1-Ep3: A Baby Orangutan Enters the World Video duration: 1:41 minutes

      The amazing moment Dana, a 25-year-old orangutan, gave birth to her first baby at Durrell Wildlife Conservation Trust, in Jersey
    6. S1-Ep4: Grey Whale Biopsy This video is a extra S1-Ep4: Grey Whale Biopsy Video duration: 1:58 minutes

      Mark's in Mexico trying to get to the bottom of the Grey Whale's sex life Watch Born in the Wild Sun 29 Jun 2014
    7. S1-Ep4: Mating Dolphins This video is a intro S1-Ep4: Mating Dolphins Video duration: 2:41 minutes

      Examining the mating rituals of dolphins Watch Born in the Wild Sun 29 Jun 2014

Born in the Wild on Channel4.com

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From elephants to kangaroos, dolphins and orang-utans, Mark Evans and Joy Reidenberg explore the wonderful and occasionally weird ways that animals make babies in hostile environments

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Sun 27 Jul3.55AM 4seven