Angry Birds POP!/Limited Time Birds

Dahlia
Used to be permanently playable in the "Piggy in the Middle", until her removal in the Autumn Orchard update and available to play for a limited time during the period.

The Blues
Available to play for a limited time during the period.

Shakira Bird
Available to play for a limited time during the period.

Bomb
Available to play for a limited time during the period.

Luca
Available to play for a limited time during the period.

Matilda
Available to play for a limited time during the period.

Hatchlings
Available to play for a limited time during the period