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How to Mark Queen Bees in 2025 Using POSCA Markers In the beekeeping world, marking a queen bee is a crucial practice for hive management. By applying a small coloured dot to a queen’s thorax, beekeepers can easily track her age and behaviour over time. And when it comes to safe, vibrant, and long-lasting colours, POSCA markers are the go-to choice for many hobbyist and professional apiarists alike. Why Use POSCA Markers for Queen Bees? Non-toxic and water-based: Safe for bees and environ …