The Blues

About
Jay, Jake, and Jim, also collectively known as The Blues, are identical characters in the Angry Birds franchise created by Rovio Entertainment. They were introduced in 2009 as the second characters introduced and core members of the original flock. Ever since their first appearance in Poached Eggs, they've appeared in numerous installments of the series as main characters.

Appearances
Angry birds Lucky Slingshot

Scary Birds

Angry birds Gender Swap!

Bad Birdies

Angry birds Lost Slingshot

Angry birds Food Takeover

Angry birds Stella 2 (playing with Luca in a cutscene)

Happy birds

Five nights at birdies

Slimy birds: Rise of Red Slime

Angry birds: Hatchlings

Angry birds 3: It's here.

Trivia

 * The Blues are the only characters to not have eyebrows. But there are rare situations like the cinematic trailer, where they do.
 * Jay has eyebrows in Angry Birds Evolution.
 * A concept of the Blues was made in 2008, showing the ability for birds to split. They and Red are the only known birds who were developed at that time.
 * The Blues' ability was never changed or even slightly modified in any slingshot-based Angry Birds game.
 * They are the smallest characters in the game, though they are known to be larger than Bubbles in animations.
 * Jay was named "Jon" in an Angry Birds Comics as a typo. This also happened with Bomb, who was incorrectly named Bob in the Space Comic.
 * Jim is the leader of his brothers.
 * When playing games that use their chrome designs, the Blues will immediately turn into corpses once the player activates their ability regardless of whether or not they touch a surface.
 * Jay is the only bird in Angry Birds Evolution to have a super shot name reused from other birds.
 * They are the third characters to receive their own game and animation, second being Stella and first being the pigs.
 * The Blues have Angry Birds Blues, Stella has Stella Toons and The Pigs have Piggy Tales (normal, pigs at work, 3rd act and 4th street)
 * Luca and the Blues are similar to each other, as they are both blue.