Question

“Telescopic Vision” found in
(a) Amphibians
(b) Birds
(c) Mammals
(d) None of the above

Answer 1

Hint: Telescopic vision is a characteristic of flying mammals that are predators. It provides the ability to see the small prey from a far distance. Eagles and Hawks have the best telescopic vision at daytime but owls have the best binocular vision at night.

Complete answer:
Telescopic vision is found in birds.
Birds like hawks and eagles can spot their prey from a distance of a couple kilometers.
Birds with telescopic vision have evolved elongated eyeballs for a greater vision distance.
Bird eyes share similarities with reptilian eyes. Both of their eyes usually move independently of each other. The flat shape of their eyes helps them focus more accurately, increasing their visual field. Their eyes have limited movement which is compensated by head movement. Birds of prey have eyes on either side of their head which grants them a wide visual field whereas nocturnal birds like owls have their eyes on the front of their head which helps them gauge the distance between them and their prey.
Mammals have dichromatic and trichromatic vision which helps them perceive colours better than birds.
Amphibians are tetrachromats and therefore perceive a broader spectrum of colours when compared to mammals.

So the correct answer is option b) Birds.

Note:
Birds of prey have telescopic vision as they have to spot their prey from great heights and distances and accurately gauge the distance between them and the prey. Hunting birds have high concentration of receptors to maximise their visual acuity. The largest field of vision belongs to the American woodcock with 360° in the horizontal plane and 180° in the vertical.