Juergen Freund / Leatherback turtle (Dermochelys coriacea) hatchlings running to the sea from nest. Jamursbamedi, West Papua, Irian Jaya, Indonesia.

Mike Read / Man and woman on jet ski with harbour wall beyond. Poole Harbour, Dorset, England, UK. September 2018.

Sven Zacek / Flock of Gulls looking for food in waves off coast of Saaremaa Island. Vilsandi National Park, Saaremaa, Western Estonia. November 2015.

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

Graham Eaton / Angler fishing at dusk in sea surf. Bass (Dicentrarchus labrax) are often caught as they hunt for food churned up by waves, Porth Ceiriad, Pwllheli, Gwynedd, Wales, UK, December 2016.

Graham Eaton / Angler fishing at dusk in sea surf. Bass (Dicentrarchus labrax) are often caught as they hunt for food churned up by waves, Porth Ceiriad, Pwllheli, Gwynedd, Wales, UK, December 2016.

Graham Eaton / Olive / Pacific ridley sea turtle (Lepidochelys olivacea) female returning to the sea after laying eggs, Cayenne, French Guiana, July.

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

PREMAPHOTOS / Moth (Rhodogastria sp) oozing a distasteful froth when molested, in rainforest, Borneo

Piotr Naskrecki / True Bug (Tomaspis sp) undergoing final molt in foamy froth in which is has spent its entire larval development, Costa Rica

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