What paint to mark a queen bee?

To mark a queen bee, use a special bee marking paint that is safe for them, typically a non-toxic, water-based paint. These paints come in various colors, and it's common to use specific colors for different years to help beekeepers easily identify the age of the queen. Always ensure the paint is dry before returning the queen to the hive, and apply only a small dot on her thorax to avoid hindering her movement.