Stephen Dalton / Froghopper (Cercopis vulnerata) adult in flight.

Wild Wonders of Europe / Giesbers / Black and red froghopper (Cercopis vulnerata) on plant stem, Liechtenstein, June 2009

MYN / Joao P. Burini / Yellow leafhopper (Cercopidae) Tapirai, Sao Paulo, Brazil. Atlantic forest. Meetyourneighbours.net project.

Stephen Dalton / Cuckoo spit with Froghopper nymph ( Cercopoidea) visible. UK

Paul Bertner / Froghopper (Cercopidae) nymph in cuckoospit froth, Nyungwe Forest, Rwanda

Paul Bertner / Froghopper (Cercopidae) nymph in cuckoospit froth, Gunung Leuser National Park, Sumatra, Indonesia

Chris Mattison / Tropical froghopper (Cercopidae) Costa Rica.

Laurent Geslin / Red and black froghopper (Cercopis vulnerata) on dandelion seedhead, with landscape of Grenoble city in background, France, May 2013.

Rod Williams / Issid Planthopper (Issus coleoptratus) Brockley, Lewisham, London, UK. November

Alex Hyde / Froghopper (Cercopoidea) Osa Peninsula, Costa Rica

Rod Williams / Issid planthopper (Issus coleoptratus) Brockley, Lewisham, London. November

James Dunbar / Froghopper nymph (Philaenus spumarius) in foam, 'Bristol, Captive.

MYN / Tim Hunt / Recently emerged Frog hopper (Philaenus spumarius) nymph, Barnt Green, Worcestershire, England, UK, June.

Rod Williams / Red-and-black Froghopper (Cercopis vulnerata) Hutchinson's Bank, New Addington, South London, England, UK, May

Alex Hyde / Cuckoo-spit, a protective foam secreted by the nymph of the Common froghopper (Philaenus spumarius). Devon, UK. June.

Alex Hyde / Common Froghopper (Philaenus spumarius), Peak District National Park, Derbyshire, UK. June.

MYN / Tim Hunt / Recently emerged frog hopper (probably Philaenus spumarius) nymph, Barnt Green, Worcestershire, UK, June. Meetyourneighbours.net project

Piotr Naskrecki / Froghopper (Cercopidae), Tierras Morenas, Costa Rica

Piotr Naskrecki / Froghopper (Cercopidae), Tierras Morenas, Costa Rica

Robert Thompson / Black and red froghopper (Cercopis vulnerata) East of Monte St Angelo, Gargano, Italy, April

MYN / Piotr Naskrecki / Two-lined Spittlebug (Prosapia bicincta) St Michaels, Maryland, USA, June. meetyourneighbours.net project

Andy Sands / Frog Hopper (Cercopis vulnerata) close-up on leaf. East Sussex, England, May.

Andy Sands / Frog Hopper (Cercopis vulnerata) close-up on leaf. East Sussex, England, May.

Andy Sands / Froghopper (Issus coleoptratus) on Oak leaf, UK, Captive, July

Nick Upton / Paper wasp (Polistes dominula) drinking moisture from cuckoo spit around developing froghopper (Cercopidae) nymph, Port Cros Island National Park, Hyeres archipelago, France, May.

Nick Upton / Paper wasp (Polistes dominula) approaching cuckoo spit around developing froghopper (Cercopidae) nymph, Port Cros Island National Park, Hyeres archipelago, France, May.

Stephen Dalton / Cuckoo spit created on grass to protect eggs and nymphs by Froghoppers (Cercopidae) UK

Simon Colmer / Common froghopper (Philaenus spumarius) nymph secreting protective liquid known as cuckoo-spit. England, UK

Stephen Dalton / Black and red froghopper (Cercopis vulnerata) in mid-hop. England, UK

Stephen Dalton / Black and red froghopper (Cercopis vulnerata) on leaf stem, UK

Stephen Dalton / Froghopper {Cercophidae} on plant stem, UK

Stephen Dalton / Black and red froghopper (Cercopis vulnerata) UK

Gary K. Smith / Black and red froghopper {Cercopis vulnerata} at rest on phragmites reed, Norfolk broads, UK, June

PREMAPHOTOS / Common froghopper adult {Philaenus spumarius} newly emerged from nymphal skin and about to leave froth, 'cuckoo spit', covering UK

Nature Production / Froghopper / Spittlebug larvae {Aphrophora intermedia} nest of foam, Japan

Nature Production / Froghopper / Spittlebug larvae {Aphrophora intermedia} creating foam nest, Japan

Duncan Mcewan / Planthopper / Froghopper (Philaenus genus) in protective spittal, Scotland, UK

Michael & Patricia Fogden / Froghopper (Cercopidae) group feeding on Heliconia (Heliconia latispatha), Costa Rica

Simon Colmer / Cuckoo spit, produced by Common froghopper nymph (Philaenus spumarius) for protection, UK.

Kim Taylor / Crab Spider {Xysticus cristatus} with captured froghopper, Europe.

Philippe Clement / Froghopper {Philaenus spumarius} next to white froth 'cuckoo spit' La Brenne, France.

Kim Taylor / Froghopper (Issus coleoptratus) late nymph. Surrey, UK. Froghoppers are the world's high-jump champions and would win a gold medal in an animal olympics competition! They can jump 70cm (more than 100...

Kim Taylor / Froghopper (Philaenus spumarius) froth nest (cuckoo spit) made by nymph on grass, UK

Kim Taylor / Froghopper emerging from 'cuckoo spit' on buttercup stem. England. {Philaenus sp}

Mark Moffett / Froghopper (Cercopidae) pair, near Kuching, Borneo

Ross Hoddinott / Ribwort plantain {Plantago sp} + Cuckoo spit (froth secreted by Planthopper larvae, UK

Konrad Wothe / Froghopper (Cercopis sanguinolenta) close-up on a leaf, Germany

Mark Moffett / Froghopper (Cercopidae) with wing markings mimicking a jumping spider

Mark Moffett / Meadow Froghopper (Philaenus spumarius) young queen entering hole she's chiseled inside Cecropia tree, carrying food grown by the tree, Peru

Nigel Cattlin / Cuckoo spit from Green / Meadow froghopper, (Philaneus spumarius) on lavender stems, Berkshire, June

Piotr Naskrecki / Froghopper (Mahanarva costaricensis), Monteverde Cloud Forest Reserve, Costa Rica

Piotr Naskrecki / Froghopper (Cercopidae), Tierras Morenas, Costa Rica

Premaphotos / Common crab spider (Xysticus cristatus) female feeding on Black-and-red froghopper (Cercopis vulnerata) UK

Guy Edwardes / Alder spittlebug (Aphrophora alni) resting on nettle stem, Rhodope Mountains, Bulgaria. June.

Guy Edwardes / Alder spittlebug (Aphrophora alni) resting on nettle stem, Rhodope Mountains, Bulgaria. June.

Joel Sartore / Photo Ark / Costa Rica froghopper (Mahanarva costaricensis) portrait, from the wild, Tapir Valley, Costa Rica.

Alex Hyde / Froghopper (Philaenus sp.) larva in cuckoospit, Nottinghamshire, UK. May.

Roman Willi / Common froghopper (Cercopis vulnerata) resting on plant stem, Lucerne, Switzerland. June. Focus stacked image. Cropped.

Nick Upton / Planthopper (Issus coleoptratus) resting on leaf in garden, Wiltshire, UK. July.

Paul Bertner / Army Ant (Labidus sp) group trying to predate froghopper protected by bubbles, Manu National Park, Peru

Paul Bertner / Army Ant (Labidus sp) group trying to predate froghopper protected by bubbles, Manu National Park, Peru

Stephen Dalton / Froghopper (Cercophid) and grass seeds caught on jeans after stroll through long dry grass. They are difficult to tell apart when not magnified. England, UK.

Stephen Dalton / Red and black froghopper (Cercopis vulnerata) jumping, Sussex, England, UK, June.

Emanuele Biggi / Meadow spittlebug (Philaenus spumarius) nymph hiding in the bubbles it makes to stay safe and humid on a grass stem, Genova, Italy, May.

Nick Upton / Black and red froghopper (Cercopis vulnerata) sunning on a Bedstraw stem in a meadow, Wiltshire, UK, May.

Nigel Cattlin / Cuckoo spit on a Stinging nettle leaf with a green Froghopper nymph (Philaenus spumarius) on stinging nettle leaf, Devon, June

Nigel Cattlin / Cuckoo spit on on a Rosemary bush caused by a Froghopper nymph (Philaenus spumarius), Devon, June

Nigel Cattlin / Cuckoo spit, frothy bubbles, exuded by common froghopper (Philaenus spumarius) nymph on rosemary plant, Berkshire, England, UK, June.

Nigel Cattlin / Cuckoo spit, frothy bubbles, exuded by common froghopper (Philaenus spumarius) nymph on rosemary plant, Berkshire, England, UK, June.

Nigel Cattlin / Cuckoo spit, frothy bubbles, exuded by common froghopper (Philaenus spumarius) nymph on rosemary plant, Berkshire, England, UK, June.

Nigel Cattlin / Cuckoo spit, frothy bubbles, exuded by common froghopper (Philaenus spumarius) nymph on rosemary plant, Berkshire, England, UK, June.