"If they were as rare as orchids we would probably rave about them" opens this film in the Secrets of Nature series, directed by the prolific Mary Field. The mesmerising time-lapse photography is offset by a jokey commentary voiced by EVH Emmett, then best known as the voice of the Gaumont newsreel. The flippant tone is exemplified by his comment on the range of responses to dandelions: "Some gardeners tear up the lawn and lay crazy paving, some tear up a high cliff and jump off".

The birdlife of Northumberland's Farne Islands comes under the spotlight.

Mary Field and F Percy Smith create this whimsical look at the breeding habits and life cycle of frogs.

King Penguins are first seen in their natural habitat, the Antarctic, after which we see them in the Edinburgh Zoo. With slow-motion pictures we see how they swim with the use of their flippers and feet. Their mating and incubating of their eggs and later, the hatching of them; the rearing of the young at various stages of their growth are also shown.

Short nature documentary by Mary Field and F. Percy Smith.

The lifecycle of a freshwater trout; looking in detail at the development of a trout embryo and hatchling. Also shows the techniques involved in dry-fly trout fishing. (NFA Catalogue) Life cycle and habits of the trout. Photographed by Percy Smith. (Synopsis)

The Secrets of Life series (1934-50) may not conform to modern expectations of nature filmmaking, inclined as it is towards giving cute fluffy creatures human names and characteristics. But it couldn't be accused of shielding kiddies from the harsher realities of the food chain, as this exercise in ruthless Darwinism demonstrates to unintentionally hilarious effect. A more than usually eccentric narrator introduces us to the newborn bunny quartet of Donald, James, Charles and Clifford, but as the film's title gives away, "the boys" aren't all long for this world as they face an assault course of hungry owls, predatory badgers, shotgun-happy gardeners and aerial bombardment (no harm in a little anti-Nazi detour, this is 1942 after all). (from http://player.bfi.org.uk/film/watch-once-we-were-four-1942/)

A wildlife film with a difference: it has A Message for any humans in the house. "The squirrel in the tree, the fox below, the birds, insects, all know that a time of plenty will not last forever". Austerity-stricken wartime viewers can learn from their economical feeding habits. An entertaining hybrid of public information and natural history from the makers of wildlife series Secrets of Life. Released in the BFI boxset Ration Books and Rabbit Pies: Films from the Home Front.

Short documentary on how cows and bulls are selected for breeding and selling.

The first in the Secrets of Life series of short films.

Go with the flow: to gentle but spellbinding effect this innovative natural history film glimpses marine life astride rising tides at Millport on the Isle of Cumbrae. Urchins, lugworm, weaver-fish and crabs are the shy-but-elegant stars coaxed onto the screen (with the assistance of Millport’s local research station) for this archetypal edition of Gaumont-British Instructional’s 1930s cinema series Secrets of Life.

The final short in the Secrets of Life series.

A retired Major's efforts to hone his golf skills are thwarted by the diminutive but defiant common daisy.

Explore London Zoo with one of its greediest residents, Sally the sparrow.

On the search for weird and amazing creatures living on the seashores... This short movie played before The Thief of Bagdad (1940) during its original run in the cinema.

A celebration of the importance of the British countryside.

This short ends with a warning that the birds helped "to preserve the leafy loveliness of our English countryside. We should therefore protect the warblers."

The perky Cockneys are London sparrows, who star in this natural history film.

History - and natural history - filmed on location in Selborne, East Hampshire. This unusual edition of the long-running series Secrets of Life tells the story of the village's famous son, Rev Gilbert White, whose 1789 book The Natural History and Antiquities of Selborne is a classic of natural history. The film follows in his footsteps, with camera rather than quill in hand, focusing on nature but also taking in views of the village and its human inhabitants. The ingenious close coverage of bird, reptile and other wildlife was the stock-in-trade of the filmmakers at Gaumont-British Instructional, producers of the series. Under the direction of the redoubtable Mary Field, the behind-screen talent here includes legendary 'cine-biologists' Percy Smith and Oliver Pike. A tribute by one generation of pioneering naturalists to another, it's a quietly moving film in spite of its clipped English reserve - or perhaps partly because of it.

The film takes us to the North of England to follow the migration of the black-headed gull down to London. There, the narrator asks viewers to "listen to their gossip", before demonstrating the bird’s flight in slow motion. We see a polecat feasting on gull eggs, and then a man collecting the eggs for human consumption, with the film telling us that they are considered a “delicacy” in London. Indeed, according to the British Trust for Ornithology, around 300,000 gull’s eggs were sold every year in Leadenhall Market in London during the 1930s, when London Visitors was made.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short.

Documentary on the life cycle of the tortoiseshell butterfly: first laying their eggs under the leaves of sting nettles and in2-3 weeks the caterpillars emerge and live off the nettle leaves. Then fully grown caterpillars spin a chrysalis. After 3 weeks the new butterfly emerges, and so the cycle continues.

A Secrets of Life documentary about the European Buzzard. The film was registered on the Board of Trade's official list under Section 6 of the Films Act as 869ft long (roughly 9 minutes if projected at 24 frames per second)

A Secrets of Life documentary about bathing time at the zoo. The film was registered on the Board of Trade's official list under Section 6 of the Films Act as 883ft long (roughly 9 minutes if projected at 24 frames per second) It is a remake, or update, of the short "Bath Time at the Zoo" from Secrets of Nature.

A study of the Spear Thistle demonstrating the processes of fertilisation.

A Secrets of Life short of which the BFI described "a delightful study of a single family which leaves one with a feeling of satisfaction and a determination to watch at least one garden nest consistently when spring returns. The views from inside the nesting box are particularly interesting and one is left wondering how the lighting was managed so well. Young children would be relieved to hear that the parents continued to feed all their young ones and not only the few which kept their balance on the branch. Useful in nature study, biology and gardening classes"

A Secrets of Life short of which the BFI gave this description: "The first part of the film is a speeded-up picture of germination and growth of the tomato plant, ending with the fertilization of the flower and the growth of the fruit. The white flies are then shown in action on the plant, and by skilful micro-photography their life cycle is shown, together with the means by which they injure the plant. A natural parasite—small species of wasp—is also shown in action by means of micro-photography,and its method of parasitism is clearlybrought out. The film concludes with apictorial demonstration of the means forridding tomato glass-houses infested withwhite fly by the use of hydrocyanic gas."

A Secrets of Life short about feeding time at the zoo. The film was registered on the Board of Trade's official list under Section 6 of the Films Act as 922ft long (roughly 10 minutes if projected at 24 frames per second)

"A study of how plants obtain the elements necessary for their existence."

"Shows how the hedgerows are used by many animals and birds to conceal their homes."

A Secrets of Life short to which the BFI gave this description: "The film falls into two related sections: the first part shows, by fast motion... the germination, growth-characteristic and fertilisation of the wild cabbage; the second part shows how the varied forms of cultivated cabbage - Savoys, Brussels sprouts, cauliflowers, sprouting broccoli - are related to the wild form, by illustrating the particular feature of the wild form that is present to an exaggerated degree in the cultivated variety... A very good example of how to deal with familiar gardening knowledge in an interesting manner, while at the same time using everyday facts to bring home the scientific lessons that can be drawn therefrom... Perhaps the most striking portions of the whole film are the sections showing which parts of the wild form have been greatly developed to produce the Brussels sprouts, cauliflower, or the Savoy cabbage."

A Secrets of Life short about the Sparrow Hawk.

A Secrets of Life short about ants.

This film shows how and why the animals which inhabit a pond are dependent one on another for their survival. We see the minnow in pursuit of water fleas and a stickleback seeking worms to satisfy his need of fuel. Carbon-dioxide, we are reminded, is essential for the growth of the green plants and the oxygen they release for the breathing of the animal population of the pond.

A Secrets of Life short about the production of seeds.

A Secrets of Life short about a raven.

A Secrets of Life short.

A Secrets of Life short about life within the pools that form along rocky shores.

A Secrets of Life short about the tawny owl.

A Secrets of Life short about the sawfly.

A Secrets of Life short about the movement of animals.

A Secrets of Life short about the emperor moth.

Captures the lives, habits and habitats of London’s pigeon population.

Explores the natural history of the otter, depicted through the fictitious account of a day in the life of Otto the Otter and his mother. The narrator claims that the short features "the first film ever taken of an otter swimming underwater."

A Secrets of Life short about badgers.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short about waterfowl.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short.

A Secrets of Life short, potentially the second in the series about the Lupin.

A Secrets of Life short.

A Secrets of Life short about the Dityscus Beetle