After the goldfinch arrives on the tree, the silent and still Laburnum tree suddenly starts trembling and moving. The whole tree comes to life as the chicks of the goldfinch make a lot of noise as they chitter and trill on seeing their mother.

The bird arrived at the other branch of the tree with a chirping sound.

The chirping sound made by the bird is an indication of its presence and movement. Birds have vocal cords and can produce various sounds for communication. Chirping is one of the most common sounds made by birds, especially during flight or when they are perched on a branch.

Chirping as a form of communication:

Birds use chirping as a means of communication with other members of their species. It can serve multiple purposes, including establishing territory, attracting a mate, or warning of potential danger. In the context of the bird moving from one branch to another, the chirping sound could be a way of communicating its intention or signaling its movement to other birds nearby.

Chirping during flight:

When birds are in flight, they often produce sounds to communicate with each other or to alert other birds in the vicinity. Chirping during flight can help the bird maintain coordination with its flock members or signal its presence to potential mates. It can also serve as a way to maintain social bonds within the group.

Chirping while perched:

When a bird is perched on a branch, chirping can serve multiple purposes. It can be a way for the bird to express its happiness or contentment. It can also be a form of territorial display, where the bird is asserting its presence and warning other birds to stay away from its territory. In the context of the bird moving from one branch to another, chirping could serve as a way to announce its movement or to communicate with other birds in the area.

Conclusion:

In summary, the bird arrived at the other branch of the tree with a chirping sound. Chirping is a common form of communication used by birds, both during flight and while perched. It can serve various purposes, including communication with other birds, establishing territory, attracting mates, and maintaining social bonds within a group.

In the poem The Laburnum Top by Ted Hughes, the goldfinch bird moves to the other side of the branch in a lizard-like manner:
Arrival: The bird arrives at the end of the branch with a chirping sound.
Movement: She moves to the other side of the branch with a rapid and precautionary movement like a lizard.
Departure: After feeding her young ones, she flies to the other side of the branch and then flies away in the sky.

The poem describes the relationship between the laburnum tree and the goldfinch bird. The bird's arrival brings life to the tree, which was previously still and silent. The tre