A Step by Step Guide to Sexing Your Regal Jumping Spider

Jul 7
3 min read

Identifying the sex of your regal jumping spider can feel tricky at first. These small, agile creatures show subtle differences between males and females that become clearer once you know what to look for. Understanding your spider’s sex helps you provide better care, anticipate behavior, and even plan breeding if you’re interested. This guide walks you through the process step by step, with clear tips and examples to make sexing your regal jumping spider straightforward.

Close-up view of a regal jumping spider showing detailed body features

Step 1. Prepare a Calm Environment for Observation

Before you start examining your spider, create a calm setting to reduce stress for both you and the spider. Jumping spiders are quick and can be shy, so a quiet room with soft lighting works best. Avoid sudden movements and loud noises.

Use a clear container or a small terrarium to gently transfer your spider.
Have a magnifying glass or macro lens ready to see fine details.

This preparation helps you get a good look without causing harm or stress.

Step 2. Understand the Basic Physical Differences

Regal jumping spiders show sexual dimorphism, meaning males and females have distinct physical traits. The main differences appear in size, coloration, and specific body parts.

Size: Females tend to be slightly larger and bulkier than males.
Coloration: Males often turn black and white whilst females retain a brown to orange colouration
Body shape: Males usually have a slimmer abdomen compared to females.

Knowing these general traits gives you a starting point before focusing on more detailed features.

Step 3. Examine the Pedipalps Closely

One of the most reliable ways to sex a regal jumping spider is by looking at the pedipalps. These are the small appendages near the spider’s mouth that look like tiny legs.

In males, the pedipalps are enlarged and bulbous at the tips. These bulbs are used for mating and are quite noticeable under magnification.
In females, the pedipalps are thinner and more leg-like without the swollen tips.

Use a magnifying glass or a macro camera to get a clear view. This difference is often the easiest and most accurate way to tell males from females.

Step 4. Check the Abdomen and Epigyne

The abdomen shape and the presence of an epigyne help confirm the spider’s sex.

Females have a rounded, fuller abdomen. On the underside, you can sometimes see the epigyne, a small, hardened plate used for reproduction.
Males have a more tapered abdomen and lack the epigyne.

To observe the epigyne, gently turn the spider over or use a clear container to view the underside. Be very careful not to harm the spider during this step.

Step 5. Observe Behavior Differences

Behavior can also give clues about your spider’s sex, especially if you watch over time.

Males tend to be more active and display courtship behaviors such as leg waving and body bobbing.
Females are usually more reserved and focused on hunting or web-building.

While behavior alone is not a definitive indicator, it supports your physical observations.

Step 6. Use a Comparison Method

If you have more than one regal jumping spider, comparing them side by side can make differences clearer.

Place two spiders in separate clear containers.
Observe their pedipalps, size, and coloration next to each other.
This direct comparison often highlights subtle differences that are harder to spot alone.

Step 7. Consult Reliable Resources and Experts

If you still feel unsure, check reputable spider care guides or forums dedicated to jumping spiders. Many hobbyists and experts share photos and tips that can help you confirm your findings.