Proto Chozo

The Chozo were an ancient and highly advanced race of bird-like sentients that inhabited several planets in the cosmos, including Zebes, Elysia, SR388, Tallon IV and possibly others. Although the eventual fate of the race as a whole is unknown, countless ruins and technological wonders are littered throughout the many planets they once inhabited.

The original Japanese name for the Chozo is 鳥人族 (chōjin-zoku) which literally means "bird-man race". The English name is a contraction of this term.

Culture
The Chozo culture seems to have mostly been a peaceful one, prizing knowledge in all its forms. The Chozo were explorers in every sense of the word, simultaneously seeking scientific and technological advancement, interstellar exploration, and primal shamanistic wisdom. They had an utmost respect of the natural fauna found in every planet they visited, with one exception. They often shared their knowledge and wisdom with other races that were equally advanced as them, as well as ones that were not as advanced as their own. [1] The balance between technology and spiritualism seems to be another defining trait of the Chozo culture.[2][3] Many of their structures were built of stone, although it is clear they were capable of using far more complicated materials and building techniques. This is most prevalent in the crafting of their statues, which seem to be present in all Chozo colonies. This art form was considered to be a sacred process, reserved only for those Chozo who had lifetimes of experience in such things.

History
The history of the Chozo is shrouded in mystery, and what is known has no accurate timeline associated with it, save that they existed well more than 1500 years before the events of the Metroid series,[5] possessed the most advanced technology and were once proud of their greatly advanced fighting strength. The species used to have a pair of wings that enabled flight on their backs, long ago. Due to their great longevity, old age wreaked havoc on their ability to reproduce, causing a steep decline in their numbers. This seemed to have an impact on their view of themselves as a warrior race and thus changed to a non-violent one. Sources also state that the Chozo's technology reached a point where it could advance no further, thus the race chose to withdraw itself and watch over other bioforms. It is known that long ago they made contact with other races throughout the cosmos, including the Bryyonians, Humans, the Luminoth (whom they have met upon their travels and shared some of their technologies, wisdom, and culture) and likely the Ylla.

As explorers and seekers of knowledge, they traded knowledge and wisdom with many of the races that they encountered. They built the observatory known as SkyTown high above the clouds of Elysia and built the robotic Elysians, later giving them the gift of self-awareness. They colonized several worlds and left behind many relics, machinery (such as drones/robots) and lore to mark their passing, the last of which is likely Tallon IV.

Many of the items Samus Aran collects in her missions contain the physical abilities the bird-like race possessed and excelled at. In the Super Metroid (Nintendo Power comic), Old Bird states that the Power Suit is meant to be tough, like the skin of a Chozo. The Chozo of Zebes, who arrived via the Wrecked Ship,[5] were known to have a "mental block" from physically harming others, such that when Grey Voice attacked Mother Brain, he was caused immense pain and nearly immobilized. This block might have been implemented when the Chozo changed their warrior-like habits and became a peaceful race.

In Metroid Prime 3: Corruption, there is a model of an unknown solar system depicted on a Celestial clock that may represent the Chozo home solar system.

Recent History
The Chozo were the adoptive parents of Samus Aran, having found Samus at Earth Colony K-2L after a Space Pirate attack destroyed the colony and killed her parents. After using their technology to infuse their blood into the young orphan, the Chozo trained Samus to become a warrior of their people, and gave her the trademark Power Suit. When Samus eventually reached adulthood, she parted ways with the Chozo, and became a Bounty Hunter. Besides this contact and one other (with Old Bird in the Super Metroid (comic)), there have been no documented encounters with the Chozo, save only with their ghostly forms on the surface of Tallon IV (who may or may not still be present after the events of Metroid Prime).

The Chozo were the adoptive parents of Samus Aran, having found Samus at Earth Colony K-2L after a Space Pirate attack destroyed the colony and killed her parents. After using their technology to infuse their blood into the young orphan, the Chozo trained Samus to become a warrior of their people, and gave her the trademark Power Suit. When Samus eventually reached adulthood, she parted ways with the Chozo, and became a Bounty Hunter. Besides this contact and one other (with Old Bird in the Super Metroid (comic)), there have been no documented encounters with the Chozo, save only with their ghostly forms on the surface of Tallon IV (who may or may not still be present after the events of Metroid Prime).