Whiskers

Type of animal hair used for sensing

Whiskers, also known as vibrissae (sing. vibrissa;), are specialized sensory hairs that help most species of mammals sense their environment. Whiskers function as highly sensitive feelers that help mammals navigate the world in many different ways, including the detection of air currents and physical objects to aid in navigation, hunting, and spatial awareness.

From Wikipedia, under CC BY-SA. More on occurri.