Secret Life of the Zoo: Night-time special shows rare seahorse birth

Meet the magical night-time creatures who come out when the moon is high at Chester Zoo, Tuesday 23 January, 8pm, Channel 4.

In an after dark special, this week's episode focuses on the time that the zoo's 800 nocturnal species wake up.

The twilight team of keepers are waiting and watching as we witness:

•             the contracepting of fruit bats with implants to quell a population explosion - but in the Fruit Bat Forest, one mum is proving hard to catch as she's carrying a newborn pup