Forces of the Covenant

The Sangeili known by most Humans as Elites, presumably due to their adeptness and their skills in combat, the Sangheili formed the military backbone of the Covenant for almost the entirety of its existence.

The Unggoy are a small species of servant warriors in the unified races of the Covenant. They are the lowest rank and are usually just used as cannon fodder, and were usually mistreated by their higher ranking Elites and Brutes. The Unggoy were one of the first species conquered and absorbed into the Covenant. In appearance, they have a combination of reptilian and mammalian features. They are the third Covenant species to be seen by Humans.

The Kig-yar are an avian species which serve the Covenant as mercenaries, and later the Covenant Loyalists. Humans have termed these vicious monsters Jackals, as they are known for their swiftness, viciousness and dexterity, even though they aren't the strongest Covenant race. Jackals will either serve as snipers or scouts within the Covenant due to their excellent sense of sight, smell and hearing. They were the first Covenant species encountered by UNSC forces.

The Yanme'e (Latin Turpis rex, translated to "dishonourable king"), also referred to by Humans as Drones, are a race of aerial, intelligent, insectoid warriors which make up part of the unified conglomerate races of the Covenant.

They are informally referred to by UNSC infantry as "buggers" or "Drones". Although they have been part of the Covenant for some time, they have just recently been put to use as combatants in the war against the Humans. Their mastery of antigravity flight assistance has give them an almost insurmountable strategic advantage in combat. They usually travel in swarms of about 12 to 50.

The Mgalekgolo are a unique gestalt of smaller creatures known as Lekgolo, which are tiny, orange, worm-like creatures that group together to geometrically increase their intelligence, strength, and maneuverability. The humans call the Mgalekgolo, Hunters. After the Great Schism there was a division within the species, some aligning with the Covenant Separatists and others remaining with the Covenant Loyalists.

The Jiralhanae also known as Brutes are a large ape-like species in the Halo series and a member of the Covenant. After the Jackals, the Brutes and Grunts were the second two Covenant species encountered by humans. The Brutes have a profound hatred of the Elites, unmatched by any other feud within the Covenant.

The Huragoks known to Humans as Engineers, are an artificial race that was created by the Forerunners. and the only known non-combatant race of the Covenant.

These are the races seen in the Halo games but there are more aliens in the Covenant army.To see them just go write  Lost species of the Covenant .