What is avian influenza?
Bird flu is an infection caused by avian (bird) influenza (flu) viruses. These flu viruses occur naturally among birds. Wild birds worldwide carry the viruses, but usually do not get sick from them. However, it is very contagious and can cause life-threatening illness in susceptible birds, including many zoo species.
Infected birds shed flu virus in their saliva, nasal secretions, and feces. Susceptible birds become infected when they have contact with contaminated excretions or surfaces that are contaminated with excretions. It is believed that most cases of bird flu infection in humans have resulted from contact with infected poultry or contaminated surfaces.
How does avian influenza impact the Zoo?
The Zoo is taking precautions to protect our birds as well as guests from potential exposure to avian influenza. These precautions differ depending on the species and the structure of their habitat. Decisions regarding closure or reopening of walk-thru aviaries and additional bird encounters will be made based on veterinary staff recommendations.
To protect our staff and our animals, personal protective equipment will be worn by staff when around birds or in their spaces. Staff access to areas with susceptible species is limited to those essential for the animal’s care. Areas of potential exposure are disinfected regularly.
The Zoo’s precautions include:
- Australasia Aviary and Tropical Rainforest – Exhibit Closed
Frequently Asked Questions
Why are some birds still on exhibit?
Some of our aviaries are more secure from exposure to wild birds. In our walk-thru aviaries, access is limited to essential staff to limit potential transfer of contaminated materials such as feces from outside birds into the space.
Can people catch avian influenza?
Per CDC, bird flu virus infections in US wild birds and poultry pose a low risk to the public. People very rarely get sick with bird flu, but those with work or recreational exposures to infected birds or poultry should take precautions.
When can we see the birds again?
This is a developing situation. The Zoo is monitoring the spread of the virus and cases within the state and our surrounding counties. Decisions for reopening will be made based on veterinary recommendations of what is safest for our animals and staff.
I have birds at home. What should I do?
Follow USDA’s biosecurity tips and consult your veterinarian with any concerns.
I found a sick or dead bird. What should I do?
Avoid contact with any wild bird and observe from a distance. To report an unusual number of sick or dead birds, call the State Bird Hotline 866-922-BIRD (2473).
How you can help protect the animals in our care during your visit
If you live or work on a cattle or poultry farm, please change your footwear between leaving the farm and arriving at the zoo. Changing your footwear will minimize the risk of virus transmission to the animals at the zoo.
For additional information please see:
Fresno County
California Department of Food and Agriculture
Center for Disease Control
