Colorful birds and cat eyes both have unique visual characteristics:
1. Colorful birds: The visual system of birds is more complex than that of humans. They can see more colors and subtler changes in hue. Unlike humans who can only see three basic colors, most birds have four or five types of photoreceptor cells, allowing them to see many more colors, including violet, mauve and infrared. In addition, many colorful birds have bright feather colors that serve to attract mates, provide cover, and warn predators.
2. Cat eyes: Cat eyes refer to a special eye structure of cats, in which the pupil can quickly adjust its size to adapt to different environmental brightness, thereby maintaining a relatively stable visual quality. In addition, cats also have highly acute night vision capabilities, thanks to the large number of rod-shaped cells in the retina of their eyes, which are responsible for detecting the intensity and direction of movement of light in the environment.
To sum up, colorful birds and cat eyes have many unique features, which allow them to adapt to different environments and living conditions, and better hunt, reproduce and avoid attacks from natural enemies.
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