The BBC's innovative'Spy in the Wild' series ends tonight with a special episode on how the show's realistic animal cameras were made. Spy in the Wild deployed over 30 ultra-realistic animatronic Spy Creatures across 31 locations over three years of filming. Over the course of the series the undercover cameras got up close and personal with some unique animal behaviours. The BBC's innovative'Spy in the Wild' series ends tonight with a special episode on how they made the show's realistic animal cameras. In tonight's behind the scenes programme viewers see the extraordinary effort that goes into getting the Spy Creatures to become part of so many different animal families.

What does a newly hatched crocodile see while it is being transported to water between its mother's jaws? How should a wild dog pup behave if it wants to be accepted by an approaching pack of adults? These and other questions will be answered in a new BBC wildlife series screening this week, in which the stars of the show are not only the animals being filmed, but the animatronic "spy creatures" used to film them. Spy in the Wild is the BBC's first major natural history series since Planet Earth II, but the footage that makes up the five-part series was captured in a very different way to Sir David Attenborough's wildlife spectacular. Using 30 remote-controlled robotic animals, each concealing miniature cameras, programme-makers captured footage they say is among some of the most intimate and revealing to date, showing a range of animal behaviours that appear to demonstrate grief, friendship and even empathy with other species.