Updated: July 8, 2025

The Red Devil Mantis (scientifically known as Deroplatys desiccata or often confused with similar species) is a fascinating and striking insect admired by entomologists and hobbyists alike. Their unique appearance, combined with intriguing behaviors, makes them popular pets and subjects of study. However, one common challenge faced by enthusiasts is distinguishing between male and female Red Devil Mantises. Understanding how to identify their sex is crucial for breeding, care, and appreciation of these remarkable creatures.

In this article, we will explore in detail the physical differences, behavioral traits, and other key indicators that make it possible to tell male and female Red Devil Mantises apart.

Overview of the Red Devil Mantis

Before delving into sexual dimorphism (physical differences between sexes), it’s important to understand the general characteristics of the Red Devil Mantis:

  • Appearance: They typically have a reddish-brown to dark brown coloration which allows them to camouflage effectively among dead leaves.
  • Size: They can grow relatively large compared to other mantis species.
  • Behavior: Known for their “leaf-like” appearance and slow movements which help avoid predators.

Sexing these mantises accurately requires careful observation since males and females often share many similar traits.

Why It’s Important to Identify Male vs Female Red Devil Mantises

Knowing whether your mantis is male or female is important for several reasons:

  • Breeding Purposes: Successful mating requires both sexes.
  • Behavioral Insights: Females tend to be more aggressive especially when gravid (carrying eggs).
  • Feeding Needs: Females generally require more food due to their larger size and reproductive role.
  • Longevity Differences: Females usually live longer than males, which influences care routines.

Physical Differences Between Male and Female Red Devil Mantises

Sexual dimorphism in mantises often manifests in differences in size, body shape, wings, antennae, and abdominal segments.

1. Size and Body Shape

The most obvious difference between male and female Red Devil Mantises is their size:

  • Females: Typically larger, bulkier, and more robust. They have a wider abdomen that is often rounded or swollen when mature or gravid.
  • Males: Smaller and slimmer with a more elongated body. Their abdomens are narrower since they do not carry eggs.

The size difference becomes more pronounced as the mantises reach adulthood. Female mantises usually grow larger because they need extra body mass to support egg production.

2. Abdomen Segments

Counting the number of visible segments on the underside of the abdomen is a reliable way to differentiate males from females.

  • Females: Have 6 visible abdominal segments.
  • Males: Have 8 visible abdominal segments.

To count these segments:

  1. Gently hold or place the mantis in a position where you can view its underside.
  2. Use a magnifying glass if necessary.
  3. The segments appear as distinct bands along the abdomen.

Males having more segments results in a longer abdomen relative to their overall body size.

3. Wings

Wings also provide important clues:

  • Females: Their wings are usually shorter relative to their abdomen length; they may not cover the entire abdomen completely.
  • Males: Have wings that extend past the abdomen tip, allowing better flight capabilities.

Male Red Devil Mantises tend to be more agile fliers than females because of this wing difference.

4. Antennae

Antennae can be subtle indicators:

  • Males: Often have longer, thicker, or more feathery antennae which help detect pheromones released by females during mating season.
  • Females: Generally possess shorter and thinner antennae.

This difference supports reproductive behaviors since males rely heavily on chemical signals to locate females.

5. Pronotum (Neck Shield)

The pronotum is the part behind the head resembling a shield:

  • Females: May have a slightly wider pronotum compared to males.
  • Males: Typically possess a narrower pronotum consistent with their slender build.

While less definitive than other features, pronotum shape contributes additional clues when combined with others.

Behavioral Differences Between Male and Female Red Devil Mantises

Physical traits aside, observing behavior can assist in sex identification:

1. Activity Levels

  • Males: More active and restless especially at night; they tend to fly or move around searching for mates.
  • Females: More sedentary; stay mostly stationary waiting for prey or mates.

2. Aggression

Female mantises are known for greater aggression:

  • Females may attack or even cannibalize males post-mating.
  • Males exhibit submissive behaviors during courtship like gentle tapping or cautious approach.

If aggressive behavior is observed especially around mating time, chances are you are dealing with a female.

3. Reaction to Stimuli

  • Males are quicker to react and take flight when threatened due to their better flying ability.
  • Females rely more on camouflage and defense postures rather than escape.

Observing these tendencies provides further indirect evidence of sex.

Tips for Sexing Juvenile Red Devil Mantises

Identifying sex in nymphs (young mantises) is much harder because many adult features haven’t developed yet. However:

  1. Wait until at least the penultimate molt (second last molt) before attempting sexing.
  2. Examine abdominal segments carefully — even juveniles show segment differences although less pronounced.
  3. Observe behavior – juvenile males might be more active earlier on than females.

Patience is key as accurate sexing becomes clearer approaching adulthood.

Using Microscopic Examination for Accurate Identification

For scientific purposes or breeders wanting absolute certainty:

  • Examine genitalia under magnification.
  • Male genitalia are located on the terminal segment of the abdomen; females have different structures related to oviposition.

This method requires specialized equipment but guarantees accuracy beyond external observation alone.

Conclusion

Identifying male and female Red Devil Mantises involves looking closely at several physical characteristics such as size, abdominal segments, wing length, antennae shape, and behavior patterns. While some traits like size can sometimes vary due to environmental factors or individual differences, combining multiple signs leads to reliable sex determination.

For hobbyists interested in breeding or caring for these mantises properly, understanding how to differentiate sexes ensures better management of their needs and enhances appreciation of their fascinating biology. With practice and careful observation, anyone can become adept at telling male from female Red Devil Mantises effectively.


By applying these detailed guidelines, you’ll gain confidence in sexing your Red Devil Mantis specimens accurately — an essential skill for every mantis enthusiast!

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