The pupils of cat's eyes are different in the morning, at noon and at night. Like jujube stones in the morning, like lines at noon, like a full moon at night. This is because the pupil of the cat's eye is larger and the sphincter of the pupil is more contractile. Under different light, the sphincter can adjust the pupil well and make the pupil adapt to the light. In the morning, the sunshine intensity is average, and the pupil becomes a jujube pit; At noon, the sun is strong and the pupils contract into a line; At night, the light is dim, and the pupils are dilated as bright as the fifteenth moon. ?

Because the pupil of the cat's eye can change with the intensity of light, no matter how the light changes, the cat can see things like an automatic camera.

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Cats, belonging to cats, are divided into domestic cats and wild cats, and are widely used pets in families all over the world. The ancestor of the domestic cat speculated that it was a kind of desert cat, Persian cat, which originated in ancient Egypt. It has been domesticated by human beings for 3500 years (but not completely domesticated like dogs).

Ordinary cats: round head, short face, five fingers on the forelimbs, four toes on the hind limbs, and sharp and curved claws on the toes, which can be extended. Night activities.

Hunting other animals by ambush, most of them will climb trees. Cats have fat pads at the bottom of their toes to avoid making noise when walking and not scaring away mice when hunting. When walking, the claws are in a contracted state to prevent them from becoming dull and protruding when catching mice and climbing.

reference data

Baidu cat encyclopedia