The steady knock of the woodpecker is read as persistence and a message that keeps tapping until it gets through. Folk tradition also links it to rhythm, work and opportunity knocking.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.