Staging- The focus of each shot is very clearly focused on a certain bird at the beginning, and as more birds join the line, there is symmetry which is appealing to look at, and it makes it easier to focus on the birds. When the big bird is in the middle, the symmetry is still pleasing, even though technically there is an extra bird on the right hand side, it still looks good.
Appeal- The birds themselves have big eyes, which makes them appealing, and especially at the part where the big bird joins, and they all fan out to look at him. Another element of the appeal is that no two birds show the same expression when you pause the video. At 1.10, there is a confused bird, an angry bird, a fairly neutral bird, and a scared-looking bird. This adds some more charm and shows that each bird has it’s own personality. The big bird itself has appeal because of it’s disproportionate body, the long legs and neck, and the tiny wings. The way it flies is exactly how you’d expect a bird with big body and tiny wings to fly, it’s legs flailing around and it can’t fly in a straight line.
Squash and stretch- When the birds imitate the bigger bird, they squash down, then spring up, and this has a small amount of squash and stretch. This is also noticeable when the big bird sits on the power line, which makes all of the other birds squash into it. The other birds get compacted, with their width getting slightly squashed in, and their height getting slightly taller.