Jay, Jake and Jim

The Blue Birds (also known as the Cyan Bird, Light Blue Bird, Splitter Bird or Glass Jaw) are a species of Birds in the Angry Birds series. First debuting in Theme 1-10, these birds are the weakest of the eight, but have the unique ability to multiply into three identical copies to fly into the pigs and their buildings.

The bird can be used in two different ways. The first way is to multiply it when the player releases it to hit the targets in one time. The second way is to multiply it right before the bird crashes onto the building, to either break through ice or to push buildings down. They are strong at destroying glass blocks.

Trivia

 * The Blue Bird is the only bird who does not have eyebrows.
 * The Birds in promos and in the original game have three parts of their tails, while the original Blue Birds have two.