how to pin a beetle

3 min read 18-01-2025

Meta Description: Learn the art of pinning beetles! This comprehensive guide provides step-by-step instructions, essential tools, and tips for preserving beetle specimens. Perfect for entomology enthusiasts and collectors, this guide ensures your beetle specimens are properly preserved for years to come. Discover the best pinning techniques, including where to insert the pin and how to spread the wings for optimal display. Preserve your entomological treasures with this detailed tutorial!

Getting Started: Gathering Your Supplies

Before you begin pinning your beetle, gather the necessary materials. Proper tools make the process easier and ensure your specimen is preserved correctly. You'll need:

Insect pins: These are fine, stainless steel pins specifically designed for entomological work. Avoid using ordinary pins; they can rust and damage the specimen. Sizes 00, 1, or 2 are generally suitable for beetles, depending on their size.
Dissecting kit: This usually includes forceps (tweezers), a spreading board (explained below), and possibly a relaxing jar (for softening dried specimens).
Spreading board: This tool, crucial for proper wing positioning, consists of two grooved pieces of foam or cork. The grooves hold the beetle’s legs and body securely. You can purchase pre-made ones or easily make your own.
Labels: Small, durable labels are essential for recording the date, location, and any other relevant information about where you found the beetle.
Magnifying glass: This can be helpful for intricate tasks, particularly with smaller beetles.

Step-by-Step Guide to Pinning a Beetle

Now, let's learn how to pin a beetle properly:

1. Relaxing Dried Beetles (If Necessary)

If your beetle is already dry and brittle, you'll need to relax it before pinning. Place it in a relaxing jar containing moist (not soaking wet) paper towels or vermiculite. Leave it for a few days, or longer depending on the size and dryness of the beetle, until it becomes pliable. Regularly check the moisture level to prevent mold growth.

2. Preparing the Spreading Board

Once your beetle is relaxed (or if it's fresh), prepare your spreading board. Insert the pin through the beetle's pronotum (the hard shell behind the head) slightly to the right of the midline. Aim for the center of the beetle's body. This ensures the pin doesn't obscure any crucial features.

3. Positioning the Beetle

Carefully position the beetle on the spreading board, ensuring its legs and wings are spread out naturally. Use the forceps to gently manipulate the legs and wings into place. The legs should be angled slightly downward and outward. Use small pins to carefully hold the legs and wings in position during this process.

4. Spreading the Wings

For beetles with elytra (hard wing covers), gently lift and spread them apart, revealing the delicate hindwings underneath. If the hindwings are visible, carefully maneuver them into a symmetrical position. Secure each wing with pins to the spreading board. The process of spreading the wings can be delicate, so take your time.

5. Securing and Final Adjustments

Once the beetle is perfectly spread, let it dry completely. This can take several days or weeks, depending on the beetle species, size, and environmental conditions. Check periodically for any slippage or changes in position. Adjust pins as needed to maintain the beetle's position during drying.

6. Labeling Your Specimen

After the beetle is completely dry, carefully remove the pins from the spreading board. Add a labeled data tag, using a fine pin, to the same pin that is in the beetle's body. Be sure to include:

Date of collection: (Month/Day/Year)
Location: (Specific location where it was found – be as precise as possible)
Collector: (Your name or the name of the collector)
Other relevant details: (Habitat information, plant associated with, etc.)

Pinning Different Beetle Sizes

The size of the beetle will determine the pin size to use. Larger beetles generally require larger pins, and smaller beetles require finer pins. The placement of the pin remains consistent, however—slightly to the right of the midline in the pronotum.

Common Mistakes to Avoid

Using the wrong type of pin: Rusting pins will damage your specimen.
Pinning through vital structures: This should be avoided. Pinning in the center of the pronotum is best.
Not allowing enough time for drying: Improper drying may lead to mold or distortion.
Forgetting to label your specimens: Proper labeling is crucial for identification and documentation purposes.

Preserving Your Collection

Proper storage is crucial for maintaining your pinned beetle collection. Store your collection in a cool, dry place, protected from pests and excessive light. Consider using airtight containers with insect repellent to prevent damage.

Pinning a beetle is a rewarding skill that allows you to preserve and appreciate these fascinating insects for years to come. With patience and practice, you'll become proficient in this crucial entomological technique. Remember to always prioritize the preservation and accuracy of your specimens.