Is there anyone who knows much about symbolism in animals?

While roasting marshmallows by my firepit and singing Christian songs, I suddenly hear leaves rustle and a rat scurrying off away from me. I look down and see a little branch of a brush left by my feet like some sort of peace offering lol. Anyone know what this can mean? Maybe the rat was just enjoying my singing and wanted to use the branch as a way of appreciation are my thoughts, or maybe he/she wanted to worship with me and show me they were with me.