Beautiful Nuthatch

This species lives in the eastern Himalayas, and has been reported in several scattered sites across Southeast Asia, in the northwest of Vietnam and in central Laos. Its range stretches west into the northeast of India, where it was reported seen near Darjeeling in West Bengal, but not since 1933. It is present in Bhutan, and in the Indian states of Sikkim (in the town of Rangpo), in Meghalaya (in the Khasi Hills), in Assam (in the Dima Hasao district), in the south of Arunachal Pradesh, and in Manipur and Nagaland. Its presence in Bangladesh is uncertain but it is found further west in the north of Burma, in Chin State (in the Chin Hills-Arakan Yoma mountain forests), the Sagaing Region, in Kachin State and in Shan State. Data on the bird from Laos is erratic, but there are reports of sightings north of Phou Kobo, and of large numbers of the species wintering in the center of the country in the pristine wilderness of Nakai–Nam Theun. There are also reports of sightings in the southeast of China’s Yunnan province, in northern Thailand and in northwestern Vietnam. Its residential and breeding range is estimated to cover 376,000 km (145,000 sq mi). Beautiful nuthatches typically inhabit both the interior and outskirts of evergreen or semi-evergreen montane forest, though in northern Burma they have been recorded nesting in trees scattered across open areas. In central Laos, the bird was found associated with the Fokienia evergreen. They usually live at altitudes of 950 m (3,120 ft) and up to nearly 2,300 m (7,500 ft) during the warm seasons but may make seasonal vertical migration. In India, for example, the species spends the summer between 1,500 m (4,900 ft) and 2,100 m (6,900 ft), but was observed during winter at just 335 m (1,099 ft) in Sikkim and in northeastern Arunachal Pradesh at 460 m (1,510 ft) and between 600 m (2,000 ft) and 800 m (2,600 ft). In Burma, they were observed at between 975 m (3,199 ft) and 1,830 m (6,000 ft), in China between 350 m (1,150 ft) and 1,975 m (6,480 ft), in Laos between 1,950 m (6,400 ft) and 2,000 m (6,600 ft) and in Thailand, the only observation of the species was at a height of 2,290 m (7,510 ft).

The beautiful nuthatch has always been rare and very localized throughout its distribution, perhaps due to very specific ecological requirements, though this has been questioned as not in keeping with the diversity of habitats in which S. formosa has been observed. Although the species is less threatened at high elevations, its habitat has been reduced by deforestation, due to logging and forest clearance to make way for human habitation. In the center of Laos and northern Vietnam, Fokienia trees, which are a known beautiful nuthatch foraging source and nesting site, are harvested for their high commercial value. Research conducted in 2001 indicated a population comprising 2,500 to 10,000 adults, and between 3,500 and 15,000 total individuals; these numbers are in decline. The species has been classified as vulnerable by the International Union for Conservation of Nature (IUCN).