What is the characteristic movement of the non-venomous Speckled Kingsnake often mistaken for a rattlesnake warning?

Answer

Vibrating the tail rapidly

The text states that the characteristic movement involves vibrating the tail rapidly, which produces a buzzing sound mistaken for a true rattlesnake's rattle.

What is the characteristic movement of the non-venomous Speckled Kingsnake often mistaken for a rattlesnake warning?
behaviorreptiletailsnake