Question

In most of the birds, eyes are fixed and cannot move. Give one merit and one demerit of this,.

Answer 1

In most of the birds, eyes are fixed and cannot move. Give one merit and one demerit of this,.Bird eyes differ dramatically from human eyes. First, birds' retinas have about three times as many sensory cells as our human retinas have. Thus, like a camera with three times more pixels, birds enjoy much keener vision than do humans. Owls, specifically, have large retinas that give them not color, but maximum black-and-white vision in very low light. Eagles, if they could read, would be able to do so from a newspaper a football-field length away.
Bird eyes don't move in their heads the way human eyes do. We can move our eyes left to right, up and down, all without moving our heads. Birds, on the other hand, with fixed eyes, must turn their heads.Most bird eyes sit on the sides of their heads--as robin eyes do. Thus, while those birds lack binocular vision, they have 340-degree peripheral vision, aiding them in spotting predators on the approach.So with its fixed eyes on the sides of its head, a robin must tilt its head in order to look down to the ground.

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Answer 2

Hello!!!

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$\huge\mathfrak{Question}$

⭕ In most of the birds, eyes are fixed and cannot move. Give one merit and one demerit of this.

$\huge\mathfrak{Answer}$

➡️ Merits

• Increased Depth Perception

• Flexibility

• Allows 3D Vision

• Visibility Beyond an Obstacle

➡️ Demerits

• Decreased Visual Field

• Limited Focus

• Prone to Disorders

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