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Rapid habitat loss and degradation are responsible for population decline in a growing number of species. Understanding the natural history of these species is important for designing conservation strategies, such as habitat enhancements or ex-situ conservation. The acquisition of observational data may be difficult for rare and declining species, but(More)
The Tonkin snub-nosed monkey (Rhinopithecus avunculus) with a global population of <250 is listed as critically endangered. It is endemic to northeastern Vietnam and was feared extinct until its rediscovery in 1989. The largest single population of R. avunculus consists of 125–130 individuals in an area of forest called Khau Ca in Ha Giang Province. We used(More)
Following the split of the silvered langurs of Indochina into two species based on molecular and phenotypic data, there is a need to reevaluate their distribution and update their conservation status. Here, we report the distribution and assess the population size of Germain’s langur (Trachypithecus germaini) within its known range across Vietnam. We(More)
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