Meaning: The sound of birds singing was all around.
Choice of Words: Chirping - to make a short, sharp, high-pitched sound, especially as a bird.
Alternative Expressions
The birds were chirping and filling the air with their song.
Meaning: This sentence means that the birds were singing and their song was spreading throughout the area.
Choice of Words: The word "chirping" is a verb that describes the sound that birds make. "Filling the air" is a metaphor that describes how the sound of the birds is spreading throughout the space around them.
The birdsong filled the air.
Meaning: This sentence means that the sound of the birds was spreading throughout the area.
Choice of Words: The word "birdsong" is a noun that describes the sound that birds make. "Filled the air" is a metaphor that describes how the sound of the birds is spreading throughout the space around them.
The air was filled with the sound of birds chirping.
Meaning: This sentence means that the sound of the birds was spreading throughout the area and that it was making the air full of sound.
Choice of Words: The word "sound" is a noun that describes the waves of energy that travel through the air and that we can hear. "Chirping" is a verb that describes the sound that birds make. "Filled" is a verb that means to make something full.