Many species had been seen around the Ang Trapaeng Thmor. It is a proof of successful ecotourism concept in Cambodia; long-term environmental, socio-cultural and economic sustainability.
I almost forget to mention about a local organization who provides birdwatching tour in Cambodia. The Sam Veasa Center (SVC) in partnership with Wildlife Conservation Society is the tour organizer of our trip. Visit thier website for more information http://www.samveasna.org