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Title reads: “British International Pictures Limited presents Secrets of Nature. Distributed by Wardour Films Ltd. The Froth Blower. Produced by British Instructional Films Ltd.“ Cuckoo spit clinging to plants. Voice over explains that this froth has nothing to do with the cuckoo but with a small insect called a froghopper. C/U of a froghopper on a stem - the film follows its life history. Tweezers are used to pull grasses apart to show where the froghopper lays its eggs. The eggs are covered with a hard coating - we are shown a C/U of a row of eggs. Froghopper nymph climbs up plant after hatching then it finds an angle in the plant to “blow bubbles to make a home“. Sap is drawn from the stem of the plant then blown out again as bubbles. The froghopper covers itself with bubbles. Extreme close up of the lancet of froghopper compared to a needle. Stem of a plant is pierced with a needle to show the white sap. The froghopper lancet pierces the stem, the creature sucks in sap and transfers it to
