Mithun, the state animal of Arunachal Pradesh, might graze outside north eastern states. This animal plays an important role in the social, cultural and ecomomic life if the local tribal population. The ownership of mithun is considered to be the sign of prosperity and superiority of an individual in the society. Farmers mainly rear Mithun for meat purpose. besides, Mithun is also given as bride price and compensation according to verdict sentenced and also the meat is popular in marriage functions, community feast and other important gatherings.

The great hornbill (Buceros bicornis) also known as the concave-casqued hornbill, great Indian hornbill or great pied hornbill, is one of the larger members of the hornbill family. It is found in the Indian subcontinent and Southeast Asia. Its impressive size and colour have made it important in many tribal cultures and rituals. The great hornbill is long-lived, living for nearly 50 years in captivity. It is predominantly frugivorous, but is an opportunist and will prey on small mammals, reptiles and birds.

Rhynchostylis retusa (also called foxtail orchid) is an orchid, belonging to the Vanda alliance. The inflorescence is a pendant raceme, consisting of more than 100 pink-spotted white flowers. The plant has a short, stout, creeping stem carrying up to 12, curved, fleshy, deeply channeled, keeled, retuse apically leaves and blooms on an axillary pendant to 60 cm (24 in) long, racemose, densely flowered, cylindrical inflorescence that occurs in the winter and early spring.

Dipterocarpus retusus, commonly known as hollong, is a large tree and perhaps the best known species in the genus Dipterocarpus. It is native to China, Vietnam, Philippines, Laos, Cambodia, Malaysia, Indonesia, Myanmar, and India. The tree, some 20–30 metres (70–100 ft) tall, is found in Cambodia in dense forests of the plains, common on hillsides and along rivers and in forests between 800 m (2,600 ft) and 1,500 m (5,000 ft) altitude. In Vietnam Hollong (Dipterocarpus macrocarpus) is the State Tree of Assam, India. Hollong is a medium hardwood, timber tree. It grows naturally in forests of upper Assam and Arunachal Pradesh. Hollong is a sacred tree for Moran community of Assam. Today Hollong is used in plywood industries.