In total 75 observations of rufous-necked hornbill were made along five trails in
Naresuan (East) Wildlife Sanctuary during January 2007 – December 2008. In addition, the
estimated density of rufous-necked hornbills was 5.55 birds/km2, which was considered as
medium compared to Huai Kha Khaeng and Thung Yai Naresuan (West) Wildlife Sanctuaries.