Void Colossus are an ancient predator of the end, very little is remembered about them besides that they were a predator of the Ender dragon, what is known is that they are a powerful boss mob that use the bulb on their back to feel what is happening above the void where they dwell, it is also believed that the carving of modern ender eyes are to mimic this great beasts one eye.
(Real world inspiration, Gorillas and Theropods.)
Ender Harriers are a small species of predatory bird from the end that can be tamed. They get their colors in the same way the real world lammergeier get their hue, their colors can also be determined by the biome they are found in. Once tamed, Ender Harriers can be used to scout out a map for their keeper.
(Real world inspiration, the African Harrier and the Lammergeier.)
Chorus Stalkers are basically the village/piglin of the end. They come in four different variants.
The plain, they have no painted pattern and are usually younger than the rest.
The gatherer, basically the gardeners of the end, they trade you all the easy to get plant life and items. They also can be seen planting chorus shoot. They are usually painted in dull purples.
The hunter, the only Chorus Stalker type to be considered a neutral mob, they will attack the player if attacked as well as attack other untamed mobs on occasion, they are painted in teals and greens, their trades would focus on the mob loot from the end.
And finally the treasurer, they are painted in deep blues and seem to be the rarest of their kind, they sell hard to get items that would only spawn in the end or special items, like your ender eyes and end crystals.
(Real world inspiration, the Utahraptor artist reconstructions, and Gibbons.)
The Echo are a pack hunting mob from lushes end biomes, they have fragile translucent skin and though don't assume they are weak, they make up for their lack of defense with their quick and strong bite, as well as their group hunting mentally, the Chorus Stalkers often referr to these creatures as some of the most unpredictable animals in the end.
(Real world inspiration, Moray Eels, and Glass Frogs.)
The Nello is a tameable and rideable mob found in the end, usually in old growth chorus forest and on rare occasion in new growth forests, they can be tamed with with chorus fruits and then saddled, a buddle can also be added to their leg, but beware that if you leave a chorus fruit in there they will rummage threw it while landed to eat their favorite food, usually dumping the begs contents in the process. The Nello, sometimes when threatened, will expand its wings to look like the eye of a Void Colossus to scare off potential predators. They are also the pollinators of the chorus forests.
(Real world inspiration, Butterflies, Archaeopteryx artist reconstructions, and Sharks.)
Hi, thank you for reading this long post. If you got this far, that is lol, I really like designing these monsters so far and really want to do more. Maybe I'll even branch out to the other dimensions like the nether. But for now, I want to thank you for reading this and wish you a good day/night!
(Side note I know my inspirations are weird, but i really can't control it ;-;)