What is a Brazilian White Knee Tarantula (B. Albopilosum)
The Brazilian White Knee Tarantula, scientifically known as Acanthoscurria geniculata, is a captivating and increasingly popular pet among arachnid enthusiasts in the UK. Often abbreviated as B. Albopilosum or simply “White Knee,” this species is admired for its striking appearance and relatively docile temperament, making it a good option for both novice and experienced tarantula keepers. These tarantulas are native to the tropical rainforests of Brazil, hence their common name. Their impressive size, with a leg span that can reach up to 8 inches, combined with their contrasting black body and white stripes on their leg joints, make them a visually stunning addition to any collection. This article explores the key facts you need to know if you’re considering adding this exotic pet to your home, covering everything from care and handling to where to find Brazilian White Knee Tarantulas for sale in the UK.
Origin and Habitat
Understanding the natural habitat of the Brazilian White Knee Tarantula is crucial for providing it with the best possible care. In the wild, these tarantulas are native to the rainforests of Brazil, where they thrive in warm, humid environments. They are terrestrial spiders, meaning they primarily live on the ground, often under logs, rocks, or in burrows they create themselves or find pre-existing. The rainforest environment provides them with the essential elements for survival, including consistent humidity, a stable temperature, and an abundance of insects for food. Replicating these conditions in captivity is critical to the health and well-being of your pet. This involves providing a suitable substrate that retains moisture, a heat source to maintain the correct temperature, and a water dish for hydration. Observing the natural habitat gives insight on creating a proper environment.
Physical Characteristics

The Brazilian White Knee Tarantula is easily identifiable by its striking appearance. The most prominent feature is the stark contrast between its black body and the distinctive white stripes on the joints of its legs, the “white knees” that give it its name. These spiders have a robust build, with a hairy exoskeleton typical of tarantulas. Their bodies are covered in urticating hairs, which they can flick off as a defense mechanism, causing irritation if they come into contact with skin. Adult females can grow to have a leg span of up to 8 inches, while males are generally smaller. The overall color pattern provides excellent camouflage in their natural habitat. Knowing their physical characteristics can help in proper identification and distinguishing between males and females, which can affect how you care for them.
Size and Lifespan
One of the appealing factors of owning a Brazilian White Knee Tarantula is its relatively long lifespan, which requires a long-term commitment from the owner. Females can live for 15 to 20 years or longer under optimal conditions, whereas males typically have a shorter lifespan, living for only 3 to 5 years after reaching maturity. The size of the tarantula varies with its age and sex. Females grow larger, reaching leg spans of up to 8 inches, while males are generally smaller. The size of your tarantula will also impact the size of the enclosure needed. The long lifespan of a female tarantula means you will be sharing your home with it for many years. The difference between a male and female lifespan is one of the many considerations to make before acquiring a tarantula.
Temperament and Handling
Brazilian White Knee Tarantulas are generally known for being docile and relatively calm tarantulas, which makes them a good choice for beginners. However, it is crucial to remember that each tarantula has its own personality, and handling should always be approached with caution. While they are not typically aggressive, they can become defensive if they feel threatened. This defensiveness may include raising their front legs in a threat posture or, in rare instances, biting. The release of urticating hairs can also be a form of defense. Observe the spider’s behavior before attempting to handle it, and never force interaction. Understanding the tarantula’s temperament and respecting its boundaries is the most important part in keeping a safe and positive relationship.
Is it Safe to Handle?

Whether or not it is safe to handle a Brazilian White Knee Tarantula is a matter of debate and depends on several factors, including the tarantula’s temperament, the keeper’s experience, and the handling environment. While B. Albopilosum are considered to be relatively docile compared to some other species, handling them always carries some risk. The biggest risk is the tarantula potentially releasing urticating hairs, which can cause significant skin irritation and itching. Bites are rare, but they can occur if the tarantula feels threatened. It’s important to remember that tarantulas are not cuddly pets and handling should be kept to a minimum. The focus should be on observing and caring for them in their enclosure. Many experienced keepers handle their tarantulas, but beginners should be more cautious and avoid it altogether. The risks and rewards need to be carefully considered.
How to Handle
If you choose to handle your Brazilian White Knee Tarantula, it is vital to do so safely and in a controlled environment. Always handle over a soft surface, such as a bed or a carpet, to minimize the risk of injury if the tarantula falls. Start by gently coaxing the tarantula onto your hand using a soft brush or by allowing it to walk onto your palm. Never grab or startle the tarantula. Handle in a calm and quiet environment, free from sudden movements or loud noises. If the tarantula shows any signs of stress, such as raising its front legs, or flicking hairs, immediately place it back in its enclosure. Wash your hands thoroughly after handling and avoid touching your face. Handling is best avoided if you are a beginner or if the tarantula is not accustomed to it. Safety is paramount.
Care and Maintenance
Providing the right care and maintenance is essential for the health and longevity of your Brazilian White Knee Tarantula. This includes maintaining the correct temperature and humidity levels, providing a suitable enclosure, and ensuring the tarantula has access to fresh water and a balanced diet. Regular cleaning of the enclosure is crucial to prevent the build-up of waste and maintain a healthy environment. It is important to remove any uneaten food, shed exoskeletons, and fecal matter promptly. The substrate needs to be replaced periodically to maintain hygiene and prevent the growth of mold or bacteria. By following these guidelines, you can create an environment that allows your tarantula to thrive. It is important to familiarize yourself with these steps before buying a tarantula.
Enclosure Requirements

The enclosure for your Brazilian White Knee Tarantula should mimic its natural habitat as closely as possible. A suitable enclosure should be large enough to accommodate the tarantula’s size, allowing it to move around comfortably. A 10-20 gallon terrarium is often adequate for an adult. It’s important to have a secure lid to prevent escape. The substrate, the material at the bottom of the enclosure, should be deep enough for the tarantula to burrow, if it chooses. A mixture of coco fiber, peat moss, and vermiculite is a good choice, as it retains moisture and provides a suitable environment for burrowing. The enclosure should also include a water dish, a hide (such as a piece of cork bark or a hollow log) for the tarantula to retreat to, and some decorations. Proper enclosure ensures the tarantula’s well-being.
Temperature and Humidity
Maintaining the correct temperature and humidity is critical for the health of your Brazilian White Knee Tarantula. The ideal temperature range is between 75-85°F (24-29°C). You can use a heat mat or a ceramic heat emitter to maintain the required temperature. Always monitor the temperature with a thermometer to ensure it remains within the appropriate range. Humidity should be kept at 65-75%, which can be achieved by misting the enclosure with water a few times a week. Proper ventilation is essential to prevent mold and mildew. Use a hygrometer to monitor the humidity levels, and adjust misting as needed. Providing the correct climate is important for their molting and overall well-being. It is crucial to find the right balance between heat and humidity.
Feeding
Feeding your Brazilian White Knee Tarantula a balanced diet is essential for its health and growth. These tarantulas are primarily insectivores, and a variety of feeder insects should be offered. Crickets, mealworms, dubia roaches, and even small locusts are all appropriate choices. The size of the insects should be appropriate for the tarantula’s size; generally, the prey should be no larger than the tarantula’s body. Feed juvenile tarantulas 2-3 times a week, while adults can be fed once a week or even less frequently. Always remove any uneaten food after 24 hours to prevent mold and pests. Provide a shallow water dish filled with fresh water at all times. The tarantula’s feeding habits can be one of the joys of tarantula ownership.
Where to Buy Brazilian White Knee Tarantulas in the UK

If you are in the UK and looking to buy a Brazilian White Knee Tarantula, there are several options available. Reputable reptile and exotic pet shops often carry tarantulas, including B. Albopilosum. Online breeders and specialized retailers are also a good source, offering a wider variety and often more specific information about the tarantulas they sell. Reptile shows and exhibitions are excellent opportunities to meet breeders, view tarantulas in person, and learn more about their care. Before making a purchase, it is essential to do your research and ensure that the seller is reputable and that the tarantula is healthy. Finding a trusted source is an important part of the process.
Reputable Breeders and Suppliers
Choosing a reputable breeder or supplier is crucial when buying a Brazilian White Knee Tarantula. Look for breeders who have a good reputation within the tarantula-keeping community and are willing to provide information about their breeding practices and the tarantulas they sell. Check online reviews and testimonials to get an idea of the experiences of other customers. Reputable breeders will prioritize the health and well-being of their tarantulas, providing them with proper care and adhering to ethical breeding practices. They will also be knowledgeable about the species and be able to answer your questions and provide guidance on caring for your new pet. A good breeder should be able to supply you with information on the spider’s lineage, age, and health. Choosing a reputable breeder will greatly increase your chances of a healthy tarantula.
Pricing and Availability
The price of a Brazilian White Knee Tarantula in the UK can vary depending on factors such as size, age, and the breeder. Generally, juvenile tarantulas are less expensive than adults. Prices can range from £20 to £80 or more, depending on the individual tarantula and the seller. Availability is usually good, as this is a relatively common species in the pet trade. However, it’s a good idea to check with different breeders and suppliers to compare prices and ensure you are getting a healthy tarantula. Be aware that the cost of the tarantula is only one part of the total cost of ownership; you’ll also need to factor in the cost of the enclosure, substrate, feeding, and other supplies. Planning your budget properly will help to ensure a successful and enjoyable experience.
Important Considerations Before Buying

Before purchasing a Brazilian White Knee Tarantula, it’s essential to carefully consider whether you are prepared for the commitment. Tarantulas have specific needs, including a controlled environment, regular feeding, and a commitment to their long-term care. Research the species thoroughly and understand its requirements. Make sure you have adequate space for the enclosure and the necessary equipment, such as a heat source, thermometer, and hygrometer. Determine if you are comfortable with handling live insects and if you have any allergies to them. Consider the lifespan of the tarantula, as you will be responsible for its care for many years. Having all the necessary knowledge will prepare you for tarantula ownership.
Legality and Regulations
In the UK, the keeping of tarantulas is generally legal, but it’s important to be aware of any local regulations or restrictions that may apply. Check with your local council or authority to ensure that you are in compliance with all relevant laws. While the Brazilian White Knee Tarantula is not a protected species, some areas may have regulations concerning the keeping of exotic animals. Some councils may require a permit or registration. You may also need to consider the implications of keeping an exotic pet if you live in rented accommodation. Before purchasing a tarantula, it is your responsibility to ensure you are compliant with all legal requirements. Always ensure you are following all the laws.
Health and Safety
When keeping a Brazilian White Knee Tarantula, it’s important to prioritize health and safety. Always wash your hands thoroughly before and after handling the tarantula or any items in its enclosure. Avoid contact with the tarantula’s urticating hairs, which can cause skin irritation. If you experience any irritation, wash the affected area with soap and water. Keep the enclosure clean and free from potential hazards. Supervise children when they are around the tarantula and ensure they understand the importance of respecting the animal and not putting their hands in the enclosure. Store any cleaning supplies, insecticides, or other potentially harmful materials safely away from the enclosure. Always be cautious and take all the necessary steps to keep yourself and your tarantula safe.
Conclusion

The Brazilian White Knee Tarantula is a fascinating and rewarding pet for those who are prepared to provide the right care. By understanding its natural habitat, physical characteristics, and the importance of proper care, you can enjoy the beauty and unique characteristics of this species. If you are considering buying a Brazilian White Knee Tarantula in the UK, remember to research reputable breeders, understand the legal requirements, and prioritize the health and safety of both yourself and your new pet. With the proper knowledge and commitment, you can enjoy years of fascination with this striking arachnid.