purring

animal behavior

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Last updated

July 13, 2026

Quick Summary

Purring is a unique vocalization produced by cats, characterized by a continuous, rattling hum. While often associated with contentment, such as when being petted, cats also purr when frightened or in pain, suggesting it may be a self-soothing mechanism.12

This sound is generated by the vibration of the laryngeal muscles in the throat as cats inhale and exhale. This ability is found in domestic cats and other members of the Felinae subfamily, like cougars and bobcats, but not in roaring cats such as lions and tigers. The mechanism involves a special pad within the vocal cord folds that vibrates at low frequencies.13

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Why Do Cats Purr?
While purring is often associated with a cat’s contentment, such as when they are being petted or snuggled up in a cozy spot, it can also occur in less happy circumstances. Cats may purr when they are frightened, in pain, or when they are sick. This…
Read More
While purring is often associated with a cat’s contentment, such as when they are being petted or snuggled up in a cozy spot, it can also occur in less happy circumstances. Cats may purr when they are frightened, in pain, or when they are sick. This…
Read More