 They proved a difficult subject for his producers, who had to deliver five hours of television featuring what are essentially immobile objects.The result was "The Private Life of Plants" (1995), which showed plants as dynamic organisms by using time-lapse photography to speed up their growth, and went on to earn a Peabody Award.Prompted by an enthusiastic ornithologist at the BBC Natural History Unit, Attenborough then turned his attention to the animal kingdom and in particular, birds.