* Peacocks: Male peacocks have vibrant blue "tail feathers" known as a train, which they fan out in elaborate displays during courtship.
* Blue-tailed damselfly: This damselfly species has strikingly blue tails that help distinguish them from other damselflies.
* Blue-tailed lizard: Several lizard species, such as the Common Five-lined Skink, have bright blue tails that aid in communication and defense.
* Some bird species: Certain bird species, such as the Blue-and-yellow macaw, Hyacinth macaw, and some species of tanagers, display vibrant blue tail feathers.
* Some fish species: Some fish, such as the Regal blue tang, Electric blue acara, and Blue chromis, have beautiful blue coloration on their tails.
* Blue Poison-dart frog: Some poison dart frogs, particularly those in the genus Dendrobates, have bright blue tails as a warning signal of their toxicity.
* Blue-tailed skink: This small lizard found in Australia, Indonesia, and New Guinea has a striking blue tail that contrasts with its brownish-gray body.