CLAUS JENSEN / SCIENCE PHOTO LIBRARY CLAUS JENSEN / SCIENCE PHOTO LIBRARY
Mating azure damselflies (Coenagrion puella) on a leaf. The male is bright blue, while the female is green. During mating, he clasps the female's neck with cerci at the end of his abdomen, while she presses her reproductive organs against his. Filmed in Denmark, in 2012.
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