I learned that crows will leave shiny gifts in exchange for food or other shiny things. It’s been documented. Crows even strung evergreens through pull-tabs to make art for this family.
Usually the crows trade with someone who has been feeding them for a while. I thought we qualified, given that it’s been ten years.
But now I have also learned the pain of crow rejection. I set out three shiny gold and silver trinkets from my jewelry-making days, just to give them some inspiration, but the crows have not even looked at them.