The horselike creatures are called Direhorses, known as Pa'li by the Na'vi. The direhorse (as with most over native creatures of Pandora) has two long, thin antennae (called a neural whip by humans) that emerge from either side of the top of the skull. These appendages have feathery tips covered in tiny cilia which undulate constantly, and seek out the antennae of other direhorses as they move near. Xenobiologists believe that the touch of antennas is for pleasure and affection, but also a means of transferring information about food sources and potential dangers; herds often move in unison shortly after touching antennae.
The animals are easily startled, and, when all six legs are working in unison, can reach ninety-five kilometers per hour. The direhorse is larger by a third than the largest Terran draft horses such as the Shire, Clydesdale or the Percheron, and substantially larger than the biggest horse ever recorded on Earth. The Na'vi are excellent riders and the direhorse, with its six legs, is a swift, nimble mount that is well-adapted to the rugged Pandoran terrain. The Direhorse is a land omnivore that uses its long snout, as well as its long giraffe-like tongue, to feed on sap. It is able to capture some protein intake through insects trapped inside the sap.