The black mountain range is truly the hot spot for bird watching in Bhutan. This black mountain range divides east from west culturally and liguistically. The evergreen forest and varities of bamboos beginning from pelela pass, strectiching all the way to the Indian border.

Zhembang is sub tropical and rich in flora and fauna. the Tingtibi Valley if the area is open to tourists. A three hours drive from Trongsa to Zhemgang takes you along the valley of Mangdi Chu. En-route you can see the Kuenga Rabten Palace, which used to be the ancestral royal palace. Leaving the Mangdi Chu, you ascend to Zhemgang on a hillock. The quaint small town has a Dzong and spectacular views of mountains and valleys. The Tingtibi valley is reached by a descent to the Mangdi Chu. South of Zhembang. 

Rufous-bellied and Chestnut Serpent-Eagles, Rufous-necked  Hornbill, Speckled Wood-Pigeon, Blue-bearded Bee-eater, Golden-throated and Blue-throated barbets, Collared Owlet, Himalayan Treepie, Oriental hawk-cuckoos,  Short-billed and Long-tailed minivets, Yellow and White-bellied fantails, Brown Dipper, White-browed Shortwing, Verditer Flycatcher, Large Niltava, Hodgson’s Redstart, Plumbeous Redstart, White-caped Redstart, Slaty-backed  Forktail, Brown-flanked Treecreeper,  Red-headed, Rufous-fronted, Yellow-browed and Yellow-cheeked tits, Mountain and Ashy Bulbuls, Chestnut-headed, Slaty-bellied and Grey-bellied tesias, Grey-sided and Brown Bush-warblers, a variety of leaf-warblers, Black-browed, Grey-headed, White-speckled, Chestnut-crowned, Broad-billed, Rufous-faced and Black-faced Flycatcher Warblers, Blue-winged laughingthrush, Slender-billed scimitar-babblers, Rufous-throated wren-babblers, Rufous-capped and Golden babblers, Red-billed Leiothrix, Cutia, Rufous-bellied, White-browed and Black-eared Shrike-Babblers, Chestnut-tailed and Red-tailed Minlas, White-naped Whiskered, and Black-chinned Yuhinas, Golden-breasted and Yellow-throated fulvettas, Greater and Rufous-headed Parrotbill, Fire-breasted Flowerpecker, Crimson-browed Finch, Spot-winged Grosbeak, Scarlet Finch, Yellow-rumped Honeyguide, and more.You need 02 days for birdwatching here.