I think the song is about a woman who did something she deeply regrets (murder?). The bird being a manifestation of her guilt. She goes back and forth with this crushing guilt to the point it gets so bad she "broke its neck" possibly meaning she ended her guilt in a very permanent way.
I think the song is about a woman who did something she deeply regrets (murder?). The bird being a manifestation of her guilt. She goes back and forth with this crushing guilt to the point it gets so bad she "broke its neck" possibly meaning she ended her guilt in a very permanent way.