Unnamed non-humanoids (23rd century)

AT: "xx" These are unidentified non-humanoid species observed in the 23rd century.

Bird-like creature

File:Bird creature, The Squire of Gothos.jpg

A bird-like creature

An Avian looking creature was displayed at Trelane's mansion. (TOS: "The Squire of Gothos")

Nibiru wildlife

In the alternate reality, the planet Nibiru was home to several animal species.

Riding animal

This animal was a large friendly quadruped, capable of standing on both two or four legs. It could be used as a riding animal by humanoids. (Star Trek Into Darkness)

This creature was a modified version of the Drakoulias from Star Trek. "We gave it a shave and a spray tan," remembered Paul Kavanagh, "and we re-rigged it with some new techniques we've developed to handle quadropeds, which gave us better animation controls." (Cinefex, No. 134, p. 77) According to the website FXGuide, the filmmakers dubbed the Nibiran version of the animal "Niborilla". [1] However, according to Cinefex (No. 134, p. 77), this name is spelt "Nibirilla".

Tree creature

Nibiru tree lifeform — A Nibiran lifeform

This small anemone-like creature, which had many small legs and retractable tentacles or feelers, could be found moving through Nibiran trees. (Star Trek Into Darkness)

Nibiru fish

The oceans on Nibiru contained fish, some of which could grow quite large, like this giant fish who passed the observation bridge window while the USS Enterprise parked on the ground of the ocean. (Star Trek Into Darkness)

Multi-eyed Alien

File:Multi-eyed alien, That which survives.jpg

A multi-eyed alien

A painting with a member of this species with many small black eyes underneath two large eyes hung in Dr. Leonard McCoy's sickbay aboard the USS Enterprise for some time. (TOS: "The Enterprise Incident", "That Which Survives")

A space-borne lifeform vaguely resembling this painting was encountered by the crew of the Enterprise in the first issue of the non-canon comic Star Trek: Early Voyages. The resemblance was probably coincidental.

Yellow creature

File:Learning pit creature.jpg

A yellow creature

In an alternate reality, one young Vulcan was studying the image of a yellow creature, which moved as if it was either flying or swiming, inside a learning pit. (Star Trek)