Canary
A canary was a type of Earth bird native to the Canary Islands.

According to Jonathan Archer, "miners used to take canaries into the tunnels with them. If the canary didn't die, the miners knew the air would be safe to breathe, and they could proceed." This analogy was made in reference to a Sphere-Builder who was discovered in 2153 in a transport pod as part of an experiment designed to monitor his exposure to normal space. ()

In 2365, Thadiun Okona joked, "Life is like loading twice your cargo weight onto your spacecraft. If it's canaries and you keep half of them flying all the time, you're alright." ()

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Earth animals
Avians