Joao Burini / Katydid (Engonia sp) male carrying a spermatophore, Intervales State Park, Sao Paulo, Atlantic Forest South-East Reserves, UNESCO World Heritage Site, Brazil.

Piotr Naskrecki / Bush Cricket (Uromenus ortegai) female carrying spermatophore produced by male during mating, Guadarrama Mountains, Spain

Chien Lee / Katydid (Eumacroxiphus brachyurus) female carrying a spermatophore pack near the tip of her abdomen from a recent mating, Gunung Mulu National Park, Borneo, Malaysia

Simon Colmer / Spermatophore / sperm packet of Palmate Newt (Triturus helveticus) captive UK

Premaphotos / Bush-cricket katydid (Poecilomon sp) female with a spermatophore from her mate attached to the rear of her abdomen, Corfu, Greece

Premaphotos / Bush-cricket katydid (Poecilomon sp) female feeding on a spermatophore passed to her from the male during mating, Corfu, Greece

Premaphotos / Bush-cricket katydid (Eupholidoptera chabrieri) female with a spermatophore from her mate attached to the rear of her abdomen, Corfu, Greece

Premaphotos / Bush-cricket katydid (Tettigoniidae) female eating the spermatophylax attached to the spermatophore passed to her from the male during mating, at night, in rainforest Brazil

Fred Bavendam / Pair of Day octopuses (Octopus cyanea) mating, male on left, reaching out with hectocotylus arm to place a spermatophore into the oviduct of female, Bali, Indonesia, Pacific Ocean.

Fred Bavendam / Pair of Day octopuses (Octopus cyanea) mating, male on left, reaching out with hectocotylus arm to place a spermatophore into the oviduct of female, Bali, Indonesia, Pacific Ocean.

Fred Bavendam / Pair of Day octopuses (Octopus cyanea) mating, male on lower right, reaching out with hectocotylus arm to place a spermatophore into the oviduct of female, Bali, Indonesia, Pacific Ocean.

Fred Bavendam / Pair of Day octopuses (Octopus cyanea) mating, male, on right, exhibiting mating colours, reaching out with its hectocotylus arm to place a spermatophore into the oviduct of the female, Ambon, Indones...