Meaning: The birds sang melodious songs during the night.
Choice of Words: Sweet and night are adjectives that describe the songs and the time when they were sung.
Alternative Expressions
The birds' melodies were delightful in the evening.
Meaning: This means that the birds were singing very nice songs in the evening.
Choice of Words: Melodies are series of musical notes that make up a song. Delightful means something that is very pleasant or enjoyable. Evening means the time of day just after sunset.
As darkness fell, the avian choir performed a harmonious serenade.
Meaning: This means that when it became night, the birds sang a beautiful song together.
Choice of Words: Darkness fell means it became night. Avian means related to birds. Choir is a group of singers. Harmonious means something that sounds good when different notes are played or sung together. Serenade is a song that is sung to someone, especially at night.