One of my favourite poems is ‘Two Girls Singing’ by Iain Crichton Smith:
I have wondered if Julian Barnes had read this poem before writing ‘Metroland’?
Here the poet Tomas Tranströmer considers bird song:
I wonder if sun has an effect on birdsong, certainly light does:
Liz Lochead in “Fugitive Colours”:
And here, Richard Holloway, in ‘Waiting for the last Bus’: