Knowledge Where on a queen bee's body is the mark applied? Expert Guide to Safe Thorax Marking
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Tech Team · HonestBee

Updated 4 days ago

Where on a queen bee's body is the mark applied? Expert Guide to Safe Thorax Marking


The mark is strictly applied to the top of the queen’s thorax. This is the central segment of the bee's body. Specifically, you must target the small, "bald" area located directly between the points where her wings attach to the body.

Precision is vital: a small, 2-3 millimeter dot placed centrally on the thorax ensures easy identification without inhibiting the queen's movement or sensory functions.

The Anatomy of a Safe Mark

Identifying the Target Zone

To mark a queen safely, you must locate the specific "bald spot" on her back.

This smooth area is situated on the thorax, right between the base of her wings. It is the only safe location for paint because it is a rigid, non-flexible part of her exoskeleton.

Sizing the Mark

The dab of paint should be approximately 2-3 millimeters in diameter.

A dot this size is large enough to be seen easily by the beekeeper but small enough to avoid spreading to sensitive areas.

Areas to Strictly Avoid

Under no circumstances should paint touch the queen's head, abdomen, or wings.

Paint on the head can interfere with her sensory organs, while paint on the wings will permanently disable her flight. Marking the abdomen is dangerous because it flexes and moves; dried paint there could restrict her mobility or breathing.

Tools and Application Methods

Industry Standard Markers

Posca pens are widely considered the industry standard for this task.

These pens use water-based, non-toxic paint that is safe for the insect. When applied correctly to the thorax, this paint is durable enough to last for the queen's entire lifetime.

Securing the Queen for Application

There are three main ways to stabilize the queen to ensure you hit the target zone on the thorax.

Experienced beekeepers may mark her directly on the frame as she walks, or gently hold her between their thumb and index finger. For those seeking extra stability, a queen catcher or marking tube is highly recommended to restrict her mobility safely during the process.

The Application Technique

Before touching the queen, shake the pen and test it on a separate surface to ensure the paint flows smoothly.

Once she is secured, apply a single, solid dot to the top center of the thorax. This ensures a clean application without the risk of paint running.

Common Pitfalls to Avoid

"Gluing" the Wings

The most critical error is using too much paint or missing the center of the thorax.

If paint spills over onto the wings, they may adhere to the body or each other as the paint dries. This renders the queen unable to fly, which can be fatal if she has not yet mated or needs to swarm.

Toxic Materials

Never use standard permanent markers or oil-based paints unless they are verified as bee-safe.

Toxic solvents can harm the queen's exoskeleton or poison her system. Always adhere to non-toxic, water-based options like the Posca pen.

Ensuring a Successful Application

To ensure the safety and longevity of your queen, choose the method that matches your experience level.

  • If your primary focus is safety and stability: Use a marking tube or queen catcher to immobilize the queen, preventing accidental marks on her head or wings.
  • If your primary focus is efficiency: Practice the "on the frame" method, but only after you have mastered the manual dexterity required to place the dot instantly on the thorax.
  • If your primary focus is equipment reliability: Always test your marker on a leaf or hive tool first to prevent a sudden surge of paint from drowning the target area.

A properly marked thorax allows for rapid identification, saving you time and minimizing disturbance to the hive during inspections.

Summary Table:

Marking Aspect Specification/Location Importance
Primary Target Center of the Thorax Most rigid, non-flexible part for safe paint adhesion.
Safe Zone Bald spot between wing bases Prevents interference with sensory organs or flight.
Dot Size 2-3 Millimeters Large enough for visibility; small enough to avoid runoff.
Approved Tools Water-based Posca pens Non-toxic to the insect and durable over time.
Prohibited Areas Head, wings, and abdomen Prevents sensory damage, flight loss, or breathing issues.

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