Observing signs of illness in our birds is crucial for their well-being. Understanding the symptoms and signs of common diseases that affect owls in falconry is an important aspect of being a responsible falconer. Not many people are aware of the wide range of diseases that can affect their owls, as they often appear healthy and strong. However, like all animals, owls are susceptible to various illnesses and infections. Let’s take a look at a few:

List of 5 Diseases that Could Affect Your Owl
These are just a few diseases that I’ve previously experienced with my Owl or come across from other falconers. It’s important to note that this is not an exhaustive list, and it’s always best to consult a veterinarian if you have any concerns about your bird’s health.
Avian Aspergillosis
Avian Aspergillosis, a potentially deadly fungal infection, is one of the diseases that could affect your Owl in falconry.
Common Signs of Avian Aspergillosis:
- Respiratory Distress: Watch for laboured breathing or wheezing.
- Decreased Appetite: Notice any sudden loss of interest in food.
- Weakness: Keep an eye out for decreased activity levels.
- Difficulty Breathing: Observe if your bird is experiencing any difficulty breathing.
Early detection and treatment of the illness are crucial in managing Avian Aspergillosis.
Bumblefoot
It was the very first Eurasian Owl that I had suffered from Bumblefoot. Boy, was I concerned! Upon closer inspection, I noticed her limping and found a swollen lump on the bottom of her foot. At first, I presumed it was probably a small injury from our training sessions, but I soon discovered it was Bumblefoot.
Common Signs of Bumblefoot:
- Limping: You may notice your bird limping or favouring one foot.
- Swollen Area on the Foot: A red, irritated, or swollen spot on the bottom of the foot could be a sign of Bumblefoot.
- Difficulty Perching: Your bird may have trouble perching or moving around.
- Loss of Appetite: Bumblefoot can cause pain and discomfort, leading to a decreased appetite.
Bumblefoot is caused by an infection or injury that leads to swelling on the foot’s underside. It’s important to seek veterinary care for treatment. To prevent Bumblefoot, ensure your bird’s perches are clean and smooth to avoid any cuts or scrapes.

West Nile Virus
West Nile virus is a viral infection that can affect birds, including owls. While it often goes unnoticed in most birds, it can cause severe symptoms in raptors, leading to death.
Common Signs of West Nile Virus:
- Loss of Balance: Observe if your bird is suddenly unable to stand or perch properly.
- Tremors: You may notice shaking or tremors in your bird’s body or head.
- Weakness: Your bird may seem weak and unable to move normally.
- Loss of Appetite: Similar to other diseases, West Nile virus can cause a decrease in appetite.
There is no curable treatment for West Nile virus, supportive care from a veterinarian can help manage the symptoms and give the bird a better chance of recovery. However, prevention is key, so be sure to take measures to prevent mosquito breeding and bites.
Trichomoniasis
Trichomoniasis, caused by the parasite Trichomonas gallinae, is common in birds worldwide. Owls can get infected by consuming prey contaminated with the parasite or through direct contact with infected birds.
Symptoms of Trichomoniasis in owls include regurgitation, weight loss, dehydration, and general lethargy. If you notice these signs in your Owl, it’s crucial to seek immediate veterinary assistance. Early detection and treatment are essential to increase the chances of recovery. If you practise proper hygiene, regularly clean your equipment, and monitor the health of your Owl, it can help prevent the spread of Trichomoniasis.

Avian Pox:
Avian pox is a viral disease that can affect owls and other bird species. It is spread through mosquito bites, midges, flies, and mites.
Signs of Avian pox in owls include growths or lesions on the skin, beak, mouth, or feet. These growths can interfere with eating and breathing. While there is no specific treatment for Avian pox, supportive care and keeping the bird isolated can help prevent its spread to other birds.
Other common Ailments and injuries your Owl may incur
Apart from diseases, owls in falconry are also susceptible to injuries and other ailments. Some common ones include:
- Fractures or broken bones from collisions or rough handling during training.
- Feather damage or plucking due to stress, boredom, illness, or hormonal changes.
- Eye injuries from flying into objects or being attacked by other birds.
It’s essential to regularly check your bird for any signs of injury or illness. Proper training techniques, a healthy diet, and regular health checks can help prevent these issues from occurring.
Always Seek Veterinary Help
Seeking veterinary help is crucial when addressing any health concerns your Owl may have, as attempting to treat them without professional guidance can potentially exacerbate the issues at hand. Here are some reasons why I regularly take my Owl to a specialist for checkups:
- Specialized Knowledge: Avian specialists have the expertise needed to accurately diagnose and treat owl-specific health issues.
- Proper Treatment: Veterinarians can provide the correct medications and procedures tailored to your Owl’s needs, ensuring effective treatment.
- Prevent Further Harm: Incorrect treatments can worsen your Owl’s condition or lead to complications, emphasizing the importance of professional care.
- Long-Term Health: Regular checkups and guidance from a vet can help maintain your Owl’s overall health and well-being, preventing future diseases or ailments.
As a falconer, it’s crucial to be aware of these diseases and injuries that can affect your Owl and take preventive measures. Remember, early detection and treatment can save your Owl.
Frequently Asked Questions
How Often Should I Take My Owl to the Veterinarian for Checkups and Preventative Care?
- I recommend regular checkups for my Owl to ensure its health and prevent potential issues. Visiting the veterinarian annually, or more frequently per their advice, allows for timely intervention and promotes overall well-being.
Are There Any Dietary or Environmental Factors That Can Contribute to the Development of Common Diseases in Owls Used for Falconry?
- In falconry, certain dietary choices and environmental conditions can contribute to common owl diseases. It’s essential to maintain a balanced diet rich in nutrients and provide a clean, stress-free habitat to prevent health issues.
