Explanation:

Pygmy Hog:

The Pygmy Hog is the world’s smallest wild pig. It is one of the most useful indicators of the management status of grassland habitats. In 1996, a captive-breeding programme of the species was initiated in Assam, and some hogs were reintroduced in Sonai Rupai area in 2009. Formerly, the species was more widely distributed along the southern Himalayan foothills but now is restricted to only a single remnant population in Manas Wildlife Sanctuary and its buffer reserves.

Namadapha flying squirrel:

The Namdapha Flying Squirrel is a unique is an arboreal, nocturnal flying squirrel that is restricted to a single valley in the Namdapha Tiger Reserve in Arunachal Pradesh.

Golden langur[Endangered]:

The golden langur, is an Old World monkey found in a small region of western Assam, India and in the neighboring foothills of the Black Mountains of Bhutan. It is one of the most endangered primate species of India.

Lion-tailed macaque[Endangered]:

Lion-tailed macaque is an Old World monkey endemic to the Western Ghats of South India. They live in areas scattered over several areas in Tamil Nadu, Kerala, Karnataka .The lion-tailed macaque is a diurnal rainforest dweller.

Some species which were recently added/ were in news under critically endangered status:

• The hump-backed mahseer (Fish) is now 'critically endangered'
• Great Indian Bustard (Bird)
• White-rumped vultures