Some literary devices are :-
1. Line one contains a metaphor comparing the evening to the sound of a dog's bark or clank of a bucket.
2. "The moon has stepped back like an artist..." is a simile.
3. Star's tremor and cows going home are examples of personification.
4. Alliteration and assonance is used throughout the poem, particularly the repitition of w, l, and the "t" sound.
5. Of course, imagery is present. It is very strong to the reader in the description of the spider web and the moon gazing amazed.