Khaisitha was created by the Goddess of Light, Meihui, in 1 BC (Before Civilization). Meihui created Khaisitha to give Wuzhen faithful messengers, which led to the birth of a new race: the avians. It is believed that Meihui mated with a red-crowned crane, one of the most powerful avians in Khaisithan history, and that Khaisithans are descendants of the rooster of the Chinese Zodiac.
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Starting with three, Khaisitha was ruled by an oligarchy: Cirasea (Green Bird), Zachariah (Hawk), Ivory (Crane). There are no written records about these three individuals because avians lived life in their bird form all the time and did not possess the ability to write.
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With the help of Wuzhen, they obtained literacy and knowledge of the outside world and became more comfortable in their human forms. Seeing promise in the new species, Meihui created different avian subspecies. Each avian subspecies went on to form their own tribe.
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To the northwest lies the region of Qinqiu. It is mainly mountainous terrain, the Hawk and Falcon Tribes live in this area. Zeru and Riyen were the first avians to lead the Hawk Tribe and Falcon Tribes.
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Over the mountains, to the northeast rests Huafeng. The Crow and Zhen Tribes, led by Cati and Gatek, reside in this area because it is far removed from the rest of the country. No one cares to enter, out of disdain for these tribes.
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The south is Jiangguan. The Sparrow and Green/Blue Bird Tribes live here. They are the ones who remain in Khaisitha because they have weaker bodies compared to the hawks or falcons.
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In the center is Jiaoxing, the capital of Khaisitha. The Peng and Owl Tribes serve as the guards to the Yûmáo Palace. And because the Crane Tribe are considered the wisest, and therefore upper-class, they also live in the capital. The only luan lives in the capital as well.
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Every time a member of the Council dies, membership rotates between the Tribes to ensure there is at least one member from the Zhen or Crow Tribes to represent them. Members of the Council are referred to as the Yûmáo (roughly translates to 'feather').
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The first set of Yûmáo; Zhina the Hawk, Rien the Blue Bird, and Zraith the Crane; ruled from 1 AC (After Creation of Naestrirea) until 238 AC, when the final member perished. Similarly to Wuzhen, it was split into four regions.
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In 788 AC, Khaisitha was engaged in battle by Aquitas (later renamed the Ceosal Kingdom) in what was to be called the Mer-Avian War. For several years, the avians of Khaisitha had been stealing food from Mer territory due to complications of the drought and unrest in their own land. While these battles occurred, the avians were dealing with uprisings among the Zhen and Crows. The Zhen had the potential to wipe out a nation with their poisonous feathers and the Crows were considered bottom feeders for their scavenging behavior. 
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An armistice was drawn so that each nation could focus on the troubles that they faced internally. Protests and riots persisted as flocks were attacked. Reports of injured avians began circulating describing how avians had every feather plucked from their bodies prior to death. An avian without feathers was considered shameful, so it created significant resentment and anger towards the merpeople.
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It took nearly a century to adjust to the Zhen and the Crows as their people, but there are still some people who are hesitant to interact with members of these tribes. The process was completed in several installments. First, the people had to understand that both parties are capable of feeling the same emotions. Second, they had to rid themselves of the fear. The Council addressed this by introducing a small number of Zhen and Crows to show them that they weren't inherently horrible creatures. Needless to say, the pride of some of the older avians was hurt, but they learned to see things from a different perspective with time.
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In 1866 AC, Khaisitha endured another drought which rendered their food sources inedible and scarce. Ten male avians entered Mer territory (see Broken Bonds, Book 2.5) and were executed on sight. Their deaths led to the demise of their mates, including former Yûmáo Sativa and Jing-Wei’s parents (Wuzhen’s current envoy).
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Their government is currently controlled by four individuals and is structured as an oligarchy: Cerai (Crane Tribe), Cellisse (Sparrow Tribe), Ariella (Blue Bird Tribe), and Raith (Zhen Tribe).