 Film techniques used by the Natural History Unit came under close scrutiny in 2008 following a number of scandals in which other programme-making departments in the BBC were revealed to have 'deceived' viewers.Examples of the use of tame animals (a red fox in "The Nature of Britain") and studio sets (deep sea life in "The Blue Planet") to simulate footage from the wild were brought to light.Nightingale rebutted accusations of misleading viewers, arguing that it is almost impossible to film certain sequences in the wild and that the Unit is open about its methods.