BFI DVD Secrets of Nature: Pioneering Natural History Films. The Battle of the Ants A 1922 British 12-minute short black-and-white silent documentary film, directed and shot by Geoffrey Barkas, featuring the conflict between two colonies of wood ants joined by a piece of tiber laid across a moat at a zoological garden. The film was included on the 2010 BFI DVD Secrets of Nature: Pioneering Natural History Films. Fathoms Deep Beneath the Sea A 1922 British 13-minute short black-and-white silent documentary film, shot by H. M. Lomas and edited by W. P. Pycraft, featuring Conger, octopus, wrasse, starfish, John Dory, pipefish, shrimp, prawn, sea robin and spider crab filmed at the Marine Biological Association in Plymouth. The film was included on the 2010 BFI DVD Secrets of Nature: Pioneering Natural History Films. Skilled Insect Artisans A 1922 British 9-minute short black-and-white silent documentary film, directed by Edgar Chance, featuring the life cycles of the ailanthus silkmoth and the red admiral butterfly, which according to Adam Dodd of BFI Screenonline was made at the time rayon was emerging as a man-made alternative to natural silk and anthropomorphised the insects in terms of their behavioural resemblance to human activities. The film was included on the 2010 BFI DVD Secrets of Nature: Pioneering Natural History Films. The Sparrow-Hawk A 1922 British short black-and-white silent documentary film, produced and shot by Charles W. R. Knight and edited by W. P. Pycraft, featuring the life-cycle of the Eurasian sparrowhawk. The White Owl A 1922 British 12-minute short black-and-white silent documentary film, compiled by W. P. Pycraft and shot by Oliver G. Pike, featuring a mother barn owl nicknamed Strix. The film was included on the 2010 BFI DVD Secrets of Nature: Pioneering Natural History Films. Busy Bees A 1926 British 11-minute short black-and-white silent documentary film featuring bumble bee, mason bee and leafcutter bee. The film was included on the 2010 BFI DVD Secrets of Nature: Pioneering Natural History Films. Floral Co-operative Societies A 1927 British 12-minute short black-and-white silent documentary film, directed and shot by F. Percy Smith, featuring the sexual elements of pollination in dandelion, globe thistle, daisy, cornflower, carline thistle and everlastings. The film was included on the 2010 BFI DVD Secrets of Nature: Pioneering Natural History Films. The Plants of the Pantry A 1927 British 13-minute short black-and-white silent documentary film, directed and shot by F. Percy Smith, featuring stop motion