We thank the Department of National Park, Wildlife and Plant Conservation of Thailand
for granting permission to conduct this research in Thung Yai (East) Wildlife Sanctuary. We
thank the Wildlife Conservation Society (WCS) Thailand for support with field survey and
materials. We are also grateful to the Thailand Hornbill Project for scholarship support through
their project on the genetics of hornbills in fragmented-forest landscape and their population and
habitat status in Thailand, funded by the National Center for Genetic Engineering and
Biotechnology (BIOTEC), Thailand. This research was made possible with great success.