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

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

Andy Sands / Alder Spittlebug (Aphrophora alni) on Oak leaf, UK, captive, July

Andy Sands / Alder Spittlebug (Aphrophora alni) on Oak leaf, UK, captive, July

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