What is the most unique type of animal reproduction?
I can’t imagine what “unique methods” is supposed to mean, to be honest. However, if you want bizarre methods, than the short-beaked echidna mammal certainly makes a strong case for your interest. In heavily populated territory, and that means an average of one echidna per 20 square kilometres, in-the-mood females will be escorted by trains of eager Romeos. Given that the randiest echidna females might attract suitors perhaps twice every three years, the Romeos are very eager indeed. Anyway, they follow her around for a week or so, perhaps six or seven of them, and they gradually become a bit more boisterous with pushing and shoving. Each wishes to whisper sweet nothings into her ears. Eventually, when she’s feeling she’s had enough of this nonsense and what’s action, she grabs hold of a convenient bush with her feet and lies waiting in expectation. At this stage there are a couple of problems. The anatomy of echidnas is such that the male has to penetrate from a lower level, and this
