Kenku: The Maligned Native

The Kenku began as among the smallest population to survive the crash-landing on Auriga, perhaps many of them perishing in the crash and its aftermath. Humans were the first to make contact with these strange birdfolk, their flight and remarkable mimicry of not just speech but even action made them quite a curious sight. This was however was exploited and it lead to the Kenku being convinced in a symbiotic alliance of slavery and servitude: the humans providing a facade of strength and technological defenses while the Kenku provide winged-slave labor and a species border between human and Dragonborn territory. As the Kenku slowly grow in population they are content to farm for the humans, sometimes fulfilling higher roles of service becoming royal stewards or special operatives, the ability of mimicry also made them surprisingly deadly samurai and duelists. They build architecture and create tools mainly for the art of it and focus on studies of mathematical sciences before advanced science fades out of existence. They develop their own religion and economy producing a way of life independent of humans. Mankind notices their natural slyness and whispers begin passing from one Kenku settlement to another of their people vanishing when serving in human land. It became obvious that a species with perfect mimicry, coupled with creativity would eventually overthrow the human Kingdom. 
The naturally expanding Kenku population began to feel the need to protest for greater freedom from human rule or otherwise and end their perceived "alliance". Humanity saw their demands to be unreasonable and the  Kenku confidently launch a rebellion. This rebellion was quickly crushed this rebellion and much of their history and culture was destroyed in the process. Important figures and family heads were executed, those who bowed survived.
There needed to be consequences for this rebellion. By the work of powerful Clerics the Kenku people were given a genetic affliction, overtime they lost their wings, their creative expression, even their language. But one thing couldn't be removed, the ability of mimicry. This ability now was essential for the species survival to replace their speech and forgeries to replace their creativity but with the loss of technology they will evermore crave the gift of flight. Their limitations make them look to others for leadership, making them obedient soldiers that help bring the human kingdom to its peak. They reluctantly fall into their new role so well that if ever a Kenku shows itself you know you've been duped, that a kingdom is as good as fallen, or that death is otherwise nigh. They still crave freedom, like a peacock needing to fly, and many of the highly skilled agents attempt to overthrow the human kingdom they built. The fearful and the wise remember the slaughter of their people in the not-too-distant past and so side with the humans against their rebellious brethren. This choice saves the species. As the rebels are destroyed, the humans are obligated to spare the lives of loyal Kenku. No longer seeing any overwhelming need of this dangerous species in their seemingly well-established kingdom, the humans ship the entire race to a harsh, distant island named Isladel Exilio. The Kenku believe they are finally being rewarded with freedom only to find themselves forever prisoners of their environment. The humans abandon them there expecting whoever survives will discover and learn to harvest whatever resources the island offers. Unbeknownst to the Kenku, the humans plan to return to reenslave them along with the mainland kingdom’s convicts, colonize the island with a military base, and export Exilio’s resources to Summerwild. However, the humans never returned as the Long Winter came, the calamity that wiped Humanities Kingdom off the face of the map, and the advent of the Jade Empire it could be said that the Kenku are truly a freed people, just as they’d believed. They dispose of the human ruling house on Exilio but have trouble flourishing in this dangerous island, also lacking the creativity to develop their own culture, and many Kenku dream of a better life beyond their island’s shores. They go on to tell tale of a once unified language and culture, legendary angelic Kenku, and ancient glorious temples. To this day many Aurigans have but heard stories of these mysterious creatures, that their ghosts still haunt the Great Houses. They are the witches of Auriga’s fairytales and the black cats of its superstitions. Turning into one is the threat used to make children eat their vegetables. The voyage to their island is charted only by humankind and is lost with their maps, though a bold or desperate sailor may attempt the journey to rediscover the people that are rumored to accept employment as spies-for-hire. Even so, it is true that there have been more sightings of the strange birdfolk in the Jade Empire, though welcomed to an extent as a curiosity but often not trusted. It is rumored that Kenku run a guild of thieves that roam the lands. A people of rumors and mysteries, is their desire for revenge the cause of humanity's disappearance, did they have something to do with the Long Winter?