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According to National Geographic , male ducks are known to violently force themselves on female ducks. While it's typically the mother's burden to birth offspring after mating, this isn't the case for Darwin frogs. According to Scientific American , these poor, mouse-sized marsupials have only 10 months before their bodies stop producing sperm and they enter an intense, two week-long mating marathon. Image: Flickr, rhonddawildlifediary. When mom told you about "the birds and the bees," this probably wasn't what she was referring to.

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If a male duck attacks a female duck and attempts to impregnate her, she can physically make sure he won't be successful.

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When female mosquitos fly close to male mosquitos, they harmonize their wing flapping as a signifier of good health and fitness. Biologist Maydianne Andrade, who's researched this mating habit, explains that a female will start to devour its male mate while they're still having sex. Male mosquitos "buzz" at between and Hertz while females buzz at about to Hz. In a PBS interview with Neil Degrasse Tyson, Andrade says, "He will insert in the female, and then he'll flip and basically do a somersault to a position where his body is immediately above her fangs By the end of mating season, stress hormones coursing through their bodies cause their immune systems to break down.

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