Assertion: peregrine falcon's population | /r/CapableOf | become extinct
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Source sentences:
text: Populations of ancestral "peregrinoid" falcons living in marginal habitat at the fringe of the African-Middle Eastern desert belt either adapted (and might have become isolated e.g. in the Persian Gulf region, which turned into semiarid habitat surrounded by vast deserts), or left for better habitat, or became extinct.
text: Due to a reduction in the use of DDT, reproductive success improved, and populations began increasing; however, the Eastern population had become extinct.