Leaving behind the relatively dry Ura valley, the route ascends through forests of gigantic firs, often with an understorey of rhododendron. The road for a few kilometres is precipitous in the extreme, with steep drops that reveal a landscape defying description, until the pass at Thrumshingla (3,750 m) is finally reached. From this highest pass in the country, the road descends to the village of Sengor, a tiny settlement of shingle roofs and lush fields. This village is also the home to this mountain's most special bird, Monal Lophophorus Impejanus.
The next two days in the Limithang Valley promise to be the highlights of the tour. The area, situated at elevations ranging from 900m to 3,780m, boasts some of the country's most pristine forests, unrivalled in the density of tree species, and thus is a natural haven for birds. The endless stretches of forests, the quaint villages and a sleepy road which winds through the valley are all frequented by many species of birds that make the entire area a delight for bird lovers. Here we have the best chance of seeing famous Bhutanese birds that may have been missed elsewhere during the trip like the Rufus-necked Hornbill, Ward's Trogon, Satyr Tragopan and endless others. There will be opportunities to spot, amongst others, the Collared Scops-Owl, Collared Owlet, Himalayan Swiftlet, Striated, Black-crested, White-cheeked, Red-vented, Ashy, Black and Mountain Bulbuls, Golden-breasted and Yellow-throated Fulvetta, Slender-billed Rusty-cheeked, Streak-breasted, and Coral-billed Scimitar-Babblers, Hill and Rufecent Prinia, Gray-headed Canary Flycatcher, Common Tailorbird, Bronzed, Lesser Racquet-tailed and Hair-crested Dorangos, and Scarlet Finch.