Unnamed non-humanoids (23rd century)

These are unidentified non-humanoid species observed in the 23rd century.

Bird-like creature
An Avian looking creature was displayed at Trelane's mansion. 

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 (NCC-1701) for some time. 

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.