Bird assemblages in Mae Yom National Park, Phrae province | สังคมของนกในพื้นที่อุทยานแห่งชาติแม่ยม จังหวัดแพร่

The objectives of Bird Assemblages at Mae Yom National Park, Phrae Province are 1) to study diversity, abundance density, diversity index, evenness and similarity of birds at Mae Yom National Park 2) to study the utilization of habitats by birds and tourists in Mae Yom National Park. The study was conducted between August 2013 and January 2014. Birds were surveyed by point count method. The results showed that there were 16 orders, 53 families, 114 genera and 172 species of bird were found birds by this study, of which 134 were resident species, 33 species were winter visitors, 3 species were passage migrant and 2 species were breeding visitors. Lom Dong – Viewpoint had the most species diversity with 125 species. According to the four abundance classification levels, there were 35 very abundance species, 12 common species, 38 uncommon species and 40 rare species. The highest density was found at Pong Nam Ron Nature Trail with 53 individuals/ha. The diversity index of the non-migrating season is 2.21 whereas it is 2.33 in the migrating season. The overall year - round diversity index is 2.32. The Lom Dong – Viewpoint and the Pa Son Yak Nature Trail have a highest year - round diversity index of 2.24. The evenness of birds during the non - migrating season is 0.86. The evenness during the migrating season and the year - round are similar, with the index of 0.90. The evenness is highest at Lom Dong – Viewpoint and the Pa Son Yak Nature Trail, both having evenness of 0.87. The similarity of the birds of the whole study area between migrating and non - migrating season is 88.31 percent. The seven routes cover 4 habitat types: the dry dipterocarp forest, the pine forest, the mixed deciduous forest and the dry evergreen forest. The similarity of birds between mixed - deciduous forest and dry evergreen forest is highest, with 75.91 percent, whereas the lowest similarity is found between mixed - deciduous forest and pine forest, 23.08 percent.