Which bird splits into three upon activation in Angry Birds?

The bird that splits into three upon activation in Angry Birds is The Blues.

The Blues are a trio of small blue birds who launch together as one unit. When the player taps the screen during flight, they separate into three individual birds, allowing the flock to strike multiple targets or change direction slightly. Their ability is especially effective against glass structures, which are weaker than wood or stone in the game's physics system.

The three birds are commonly identified as triplets named Jay, Jake, and Jim. This can cause confusion because players sometimes call them “the Blue Bird” or assume that “The Blues” refers to a single character. In the game, however, the canonical name is plural because the character is a group.

The Blues appeared in the original Angry Birds and became recognizable members of the wider franchise. Their splitting mechanic contrasts with other signature abilities: Chuck accelerates, Bomb explodes, and Matilda drops an explosive egg projectile.