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Scientist holding Anaconda snake (Eunectes murinus} sperm plug - many males attempt to mate with a single female who decides to accept or reject sperm. Venezuela, South America
01084874
Francois Savigny / Scientist holding Anaconda snake (Eunectes murinus} sperm plug - many males attempt to mate with a single female who decides to accept or reject sperm. Venezuela, South America
Female Great diving beetle (Dytiscus circumflexus) view of underside with cloacal sperm plug from previous mating, UK, captive.
01460657
Will Watson / Female Great diving beetle (Dytiscus circumflexus) view of underside with cloacal sperm plug from previous mating, UK, captive.
Sperm plug of successful male Anaconda after mating {Eunectes murinus} Llanos Venezuela
21066066
Francois Savigny / Sperm plug of successful male Anaconda after mating {Eunectes murinus} Llanos Venezuela
Apollo (Parnassius apollo) butterfly female in flight over field, sphragis present following copulation. Pargas, Aboland, Finland. July 2019.
01660215
Jussi Murtosaari / Apollo (Parnassius apollo) butterfly female in flight over field, sphragis present following copulation. Pargas, Aboland, Finland. July 2019.