For centuries, pink eggs have puzzled collectors and scientists. These rare eggs, often found in groups, contradict the common understanding of avian shell shades. Can they be attributed to a rare genetic variation? https://docs.google.com/spreadsheets/d/1qL-aIM5KxaBFeWx9uqNsFK4KthW88k7ORDu_7a02O8s/edit?usp=sharing