How To Tell If Ball Python Is Male Or Female

How To Articles

As a passionate reptile enthusiast and owner of several ball pythons, I understand the excitement and curiosity that comes with wanting to know the gender of your beloved snake. Determining the sex of a ball python may seem challenging at first, but with a keen eye and some knowledge about their anatomy, it becomes much easier to differentiate between males and females.

Anatomy of a Ball Python

Before diving into the specifics of how to determine the sex of a ball python, it is essential to familiarize ourselves with their anatomy. Ball pythons have both external and internal reproductive organs that play a crucial role in identifying their gender.

Let’s begin by examining the external traits:

  1. Size: Adult male ball pythons tend to be smaller and slender compared to females. Although this is not a foolproof method, it can be a helpful starting point.
  2. Tail Length: Males usually have longer tails, while females have shorter, stockier tails. This is because the male’s tail houses the hemipenes, which are the male reproductive organs.
  3. Spurs: Look for small, claw-like structures called spurs located on either side of the vent (cloacal opening) near the base of the tail. Males have more prominent and larger spurs compared to females, whose spurs are often smaller and more inconspicuous.

Now, let’s explore the internal characteristics that can help determine the sex of a ball python:

  1. Popping: This method should only be attempted by experienced individuals such as veterinarians or professional breeders. It involves carefully inserting a probe into the vent of the snake to feel for the presence of hemipenes. If the probe can be inserted more than a few scales, it is likely a male. If the probe encounters resistance after a short distance, it is most likely a female.
  2. Ultrasound: Another reliable method for determining the sex of a ball python is through the use of ultrasound. This non-invasive technique allows for a visual examination of the internal reproductive organs. A skilled veterinarian can identify the presence or absence of hemipenes in males or the presence of follicles in females.

Personal Experience and Tips

During my own experiences in sexing ball pythons, I have found tail length to be a helpful initial indicator. However, it is important to note that sexing snakes solely based on external traits can be misleading, especially in younger individuals. It is always best to use a combination of external and internal methods to achieve accurate results.

It is crucial to approach the snake calmly and gently during the sexing process. Stress can cause the snake to become defensive or agitated, making it difficult to get an accurate assessment. I recommend having a knowledgeable friend or reptile expert assist you, especially if you are a beginner.


Sexing a ball python can be an exciting and rewarding experience for any reptile enthusiast. By examining the external traits such as size, tail length, and spurs, as well as utilizing more advanced techniques like popping or ultrasound, you can confidently determine the gender of your ball python. Remember to handle your snake with care and seek assistance from professionals if needed. Happy snake keeping!