Ear wiggling is movement of the external ear using the three muscles which are attached to it forward, above and behind. Some mammals such as cows have good control of these muscles, which they use to twitch and orient their ears, but humans usually find this difficult. Research conducted on humans using a

kymograph A kymograph (from Greek κῦμα, swell or wave + γραφή, writing; also called a kymographion) is an analog device that draws a graphical representation of spatial position over time in which a spatial axis represents time. It basically cons ...

to measure their ear movements found that only two out of twelve subjects had any voluntary control at the start, but that the others could acquire this by training with an early form of

biofeedback Biofeedback is the process of gaining greater awareness of many physiological functions of one's own body by using electronic or other instruments, and with a goal of being able to manipulate the body's systems at will. Humans conduct biofeedbac ...

. Female rats wiggle their ears when they are in heat, to excite male rats and encourage them to mate.

References

Biofeedback Ear {{anatomy-stub