The Dasyueshan National Forest Recreation Area encompasses quite a large territory, including diverse and intact vegetative communities that support innumerable wildlife species with their excellent habitats and environments. Within the scope of the park area among all types of wildlife, birds are the most accessible to observe, and have the most species and largest populations. Consolidating past records of investigative reports, at least 107 species in 32 families have been recorded within the park, including the endemic Mikado Pheasant (Syrmaticus mikado), Swinhoe's Pheasant (Lophura swinhoii), White-eared Sibia (Heterophasia auricularis), and Taiwan Yuhina (Yuhina brunneiceps), and the endemic subspecies of Island Thrush (Turdus poliocephalus), Vivid Niltava (Niltava vivida), and Eurasian Jay (Garrulus glandarius). Except for species normally found on the plains and at low elevations, most of Taiwan's resident species have been seen in this area. In March 2008 to April 2009, the Endemic Species Research Institute (ESRI) sponsored an avian ecological investigation of hiking trails, and recorded 100 species, with more than 50 species seen in each month, which indicates that bird populations here have high complexity and are stable. For this reason, Dasyueshan National Forest Recreation Area relatively early became known among bird lovers as a birdwatcher's paradise, and was designated by the Transportation Department's Tourist Bureau as the number one birdwatching spot among the "Ten International Birdwatching Spots of Taiwan". When foreign bird lovers come to Taiwan to observe birds, they must come here.