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Like many endangered species, Aotearoa’s flightless and nocturnal kiwi survive only in small, fragmented and isolated populations. This leads to inbreeding and, eventually, inbreeding depression — reduced survival and fertility of offspring. Mixing kiwi from different populations seems a good idea to prevent such a fate. But translocating kiwi in an effort to mate birds that are not closely related can come with the opposite risk of outbreeding.
