Bird

File:Bird creature, The Squire of Gothos.jpg

A birdlike creature in Trelane's mansion

An avian species, often simply referred to as bird, was a race that is reminiscent of Earth birds. This generally meant that avian species had feathers, and sometimes a beak and claws. Avians usually reproduced by laying eggs.

The study of birds was called ornithology.

Chickens and ducks were among the animals the Bringloidi took with them when they were evacuated from their planet by the USS Enterprise-D. (TNG: "Up The Long Ladder")

The starship USS Raven was named after the bird of the same name. (VOY: "The Raven")

When Leonardo da Vinci had trouble understanding what had happened to him when he was transported onto Tau's planet, Captain Janeway likened his situation to that of a sparrow, only interested in hunting insects and singing for a companion and not knowing anything about the politics of Florence. (VOY: "Concerning Flight")

Early models of da Vinci's flying machines were based on bats or sparrows. Janeway suggested, however to base them on hawk instead. (VOY: "Scorpion")

Bird-like species could be seen flying across the skies of Mintaka III, Tarok, and an unnamed planet in the Delta Quadrant. (TNG: "Who Watches The Watchers"; VOY: "Initiations", "Time and Again")

A humanoid bird-like creature was on display in Trelane's mansion. (TOS: "The Squire of Gothos")

Bird was one of the words Miles O'Brien used due to his infection of the aphasia virus. (DS9: "Babel")

Major Kira Nerys told Mullibok a story from her childhood about a huge ugly tree in front of her window, so big and ugly even the birds won't sit on him. (DS9: "Progress")

The holographic baseball park program where Captain Benjamin Sisko trained the members of his baseball team, the Niners, in 2375, possessed a continuous background noise of simulated bird calls, though no birds were ever seen. (DS9: "Take Me Out to the Holosuite")

In the revised final draft script of TOS: "Balance of Terror", a metaphorical bird was mentioned by Romulan officer Decius. He specifically imagined a Romulan Bird-of-Prey which he was serving on chasing after and defeating the Enterprise, likening that to a hunting bird causing a field creature to flee from it.

Birds in art

Birds were often seen incorporated into pieces of art, like sculptures. (TNG: "Encounter at Farpoint", "Too Short a Season", "The Bonding", "Unification II", "Starship Mine", "Preemptive Strike", "All Good Things...")

A bird-like creature was seen on a Vulcan wall decoration on the planet Dekendi III. (ENT: "Stigma")

The Romulan logo consists of a bird-of-prey holding Romulus and Remus in its talons. (TNG: "The Neutral Zone")

Da Vinci was so fascinated by Tuvok's Vulcan ears that he drew a picture of a caged bird with pointed Vulcan ears as wings. (VOY: "Concerning Flight")