The Expansion Flock is a group of birds replacing the original Flock.
Main members of the group are listed here.
Midnight Bird replaces Red Bird. Midnight Bird is a midnight blue bird and is the leader of the group.
Orange Bird replaces Blue Bird. Orange Bird is an orange bird (exactly) and is the co-leader of the group.
Star Bird replaces Yellow Bird. Sun Bird is a dark orange bird and is the first member to know when excluding the founders.
Atomic Bird replaces Black Bird. Atomic Bird is similar to Black Bird except with a different beak.
Suite Bird replaces White Bird. Suite Bird is actually a female White Bird.
Expanding members of the group are listed here.
Crow replaces Boomerang Bird. Crow is an all-black Boomerang Bird that has the power to swoop down destroying things and popping pigs.
Hawk replaces Big Brother Bird. Hawk is similar to a chocolate Big Brother Bird with a beak and eyes and eyebrows looking true.
Pale Blue Bird replaces Orange Bird. Pale Blue Bird is a pale blue bird (exactly) that can fly upwards.
Former leaders of the group are listed here.
Fire Mighty Eagle replaces the normal Mighty Eagle. The Fire Mighty Eagle is actually the Mighty Eagle but on fire. He is the former leader of the group before he retired and turned into a normal member.
The Mighty Toucan is the Mighty Eagle combined with the Boomerang Bird. The Mighty Toucan is a former co-leader of the group before he retired and turned into a normal member.
Mighty Flying Blowfish is actually a giant flying blowfish. He is a co-leader too but he retired and turned into a normal member.