Arod
The horse of Legolas. He is the grey horse given to Legolas by the Riders of Rohan in The Two Towers. Gimli also rides on him by sitting behind Legolas. They ride in the traditional Elven way without a saddle. They travel on Arod for much of their journey until they reach Minas Tirith, including the journey on the Paths of the Dead and the march to Pelargir. The epilogue to The Lord of the Rings (published in The History of Middle-earth, volume IX, Sauron Defeated) has Sam saying that "Legolas let his horse run back free to Rohan from Isengard", presumably after the war, when Legolas and Gimli left the rest of the Company to visit Aglarond and Fangorn.
Read more about this topic: List Of Middle-earth Animals, Individual Animals