Why Do Giraffes Have Purple Tongues?

The Prehensile Tongue

Giraffes possess one of the most specialized tongues in the animal kingdom. It measures between 45 and 50 centimeters long. The tongue is prehensile (able to grasp), acting much like a finger to twist around branches and pull them close. It creates a hook shape to strip leaves off trees efficiently.

The color of the tongue is a deep purple, blue, or almost black. Scientists believe this dark color acts like sunscreen. Since giraffes spend up to 75% of their day feeding with their tongues exposed to the hot African sun, the high amount of melanin (dark pigment) prevents the sensitive tissue from getting sunburned. The tongue is so long and flexible that a giraffe can even extend it to clean its own ears or remove bugs from its face.

Eating Around Thorns

A giraffe’s favorite food comes from the acacia tree. These trees are covered in sharp, long thorns that deter most other animals. The giraffe’s tongue is tough and muscular, allowing it to navigate between the spikes without injury. Thick, sticky saliva coats the tongue and the inside of the mouth. This saliva acts as a protective layer against scratches and helps the giraffe swallow rough leaves easily. They are ruminants (cud-chewers), meaning they have a stomach with four compartments to help digest these tough plants.

Height and Reach

Giraffes are the tallest land animals. An adult male can grow up to 5.5 meters tall. This height allows them to browse the tree canopy where other herbivores (plant eaters) cannot reach. Despite its length, the giraffe’s neck contains only seven vertebrae (neck bones), the same number as a human neck. Each bone is simply much larger, measuring up to 25 centimeters long. To pump blood all the way up this long neck to the brain, the giraffe has a massive heart weighing approximately 11 kilograms.