5.3. Conclusion
This study provides much-needed quantification of population status over a time scale that is longer than many shortterm
studies and which can be used to assess management effectiveness. Our results suggest that Yok Don, once so important
for this species, has not been effective at maintaining the population, whereas Cat Tien National Park, in contrast, has been.
Within Cat Tien, however, there is variation and it appears that the part of the park that is most well known for tourism
has not only the best current population but it has not declined either. Where there is little tourism, however, problems
can be acute, as demonstrated by the extinction of the lesser one-horned rhinoceros in Cat Loc in 2010 (Brook et al., 2011).
The status of the green peafowl population in northeast part which was recorded in 1991 (Robson et al., 1991) is still not
clear and might also be subject to a decline from hunting pressure as it lies far from highly visited area. In Costa Rica the
population of scarlet macaw (Ara macao) increased after by stakeholders stimulated economic activities focusing on the
development of ecotourism (Vaughan et al., 2005).
We recorded 165 bird species in Yok Don, of which five were categorized as threatened or near-threatened (IUCN,
2012): great slaty woodpecker (Mulleripicus pulverulentus) (Vulnerable), great hornbill (Buceros bicornis) (Near Threatened),