Sub-alpine coniferous forest belts comprise the forest line in Taiwan's mountainous areas. The most common type of tree found in such belts is the Abies kawakamii, and since these belts are often dominated by this single species of tree, the belts are usually called pure Abies kawakamii forests. The most common cover plant in Abies kawakamii forests is the Yushania niitakayamensis. Common mammals inhabiting the belt include the Formosan sambar, Formosan reeve's muntjac, Formosan serow, Formosan black bear, Formosan rock-monkey, and Formosan wild boar; while common birds include the Mikado pheasant, Collared bush robin, Flamecrest, Formosan alpine accentor, Formosan laughing thrush, Vinaceous rosefinch, and Formosa barwing. Occasionally, rare species of fauna can also be found here, such as the Hsuehshan grass lizard, Alisan's salamander, and Sonani's salamander.