The first one…

A grey bird with a long yellow beak bursts out of a hole in a clock tower, flying forward with its wings spread and a small wooden bell in its foot, then disappears from view, leaving the clock tower with the broken hole visible. The scene repeats, showing the bird emerging again, flying forward, and then vanishing, followed by a close-up of a yellow bird with wide eyes and an open beak, before returning to the clock tower.