Q. Which of the following is not a bird?

Explanation : 

Golden Mahseer

The Golden Mahseer (Tor putitora) is not a bird; it is actually a type of fish. This freshwater fish is found in rivers and streams across South and Southeast Asia. It is highly regarded among anglers for its size and the challenge it presents in sport fishing. The Golden Mahseer is known for its beautiful golden coloration and is considered an important species in riverine ecosystems.

Other Avian Species

On the other hand, the other options listed are indeed birds:

The Indian Nightjar

The Indian Nightjar (Caprimulgus asiaticus) is a bird species found in the Indian subcontinent. It is a nocturnal bird, with cryptic plumage that helps it blend into its surroundings during the day.

Spoonbills

The Spoonbill is a group of large, long-legged wading birds, which includes several species such as the Eurasian Spoonbill (Platalea leucorodia). They are named for their distinctive spoon-shaped bills, which they use to sift through mud to find food in wetlands.

The White Ibis

The White Ibis (Eudocimus albus) is a species of bird found in the Americas, particularly the southeastern United States and parts of Central and South America. It is easily recognizable by its all-white plumage, black-tipped wings, and long, down-curved bill.

Therefore, the correct answer to the question is the Golden Mahseer, as it is the only option that is not a bird.