Common Hammock-Weaver spiders (Linyphia triangularis) during courtship

Mating spiders. Norrfällsviken, High Coast, Västernorrland, Sweden
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Arctic tern (Sterna paradisaea) flying over sunlit waterOn a beautiful day in late summer we came across a couple of Common Hammock-Weaver spiders (Linyphia triangularis). We were able to film their courtship and mating: the male moved around the web, drumming with his forelegs and repeatedly reducing the web to minimize disturbances during copulation. Two times they mated, the male spider transferring glittering sperm drops to the females ovipore. The mating went on for more than an hour in the golden light of the summer evening.
Ulrich Kunst and Bettina Scheidulin
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