Brute

The Jiralhanae (Latin, Servus ferox, translated to "Wild Slave"), also known as Brutes, are a large ape-like species in the Halo series and a member of the Covenant. After the Kig-yar, the Jiralhanae and Unggoy were the second two Covenant species encountered by humans. The Brutes have a profound hatred of the Sangheili, unmatched by any other feud within the Covenant. The Jiralhanae have been part of the Covenant since before the destruction of the UNSC farming colony on Harvest, and were always feared by theSangheili for their megalomaniacal behavior.

Pictures
http://images1.wikia.nocookie.net/halo/images/9/98/BestiarumBrute.jpg