BBC series uses robot creatures to document secret lives of animals

Spy in the Wild uses camouflaged cameras to capture unprecedented footage of wildlife in five-part show

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.