The music came first, in the order of appearance in the song. The opening chord progression,followed by the picking you hear during the verse, then the bridge build up through to the resolution.
The verse starts the vocal and I had the opening line right from the start. So I had to think about a songbird… or songbirds. This got me through the first two verses, to the last line of the second verse “They sing out their hearts for you”.
At that point, I recalled a great passage from a great book, To kill a Mockingbird. “It’s a sin to kill a Mockingbird” because Mockingbirds do no harm, “They don’t do one thing but sing their hearts out for us”. This gave me the bridge, the resolution and the third verse. Where I ask the Songbird(s) to join in and sing loud and clear… which is what being a Songbird is all about!