Avian flu kills three condors that frequented Grand Canyon, Zion NPs, Vermillion Cliffs NMon

Highly Pathogenic Avian Influenza (HPAI) has been confirmed as the cause of mortality for three California condors found in northern Arizona, according to wildlife officials. The Arizona-Utah population moves throughout northern Arizona and southern Utah, using the landscape within Grand Canyon National Park, Zion National Park, Vermillion Cliffs National Monument, the Kaibab Plateau, and surrounding areas. To date, the virus has not been detected in the other condor populations in California or Baja California, Mexico.

On March 9, The Peregrine Fund, which manages the Arizona-Utah condor flock, first observed a bird in the wild exhibiting signs of illness, initially suspected to be lead poisoning. Crews continued to monitor this bird and others showing similar behavior. On March 20, they collected the deceased female below her nest, which was the first bird confirmed positive with HPAI.

https://www.nationalparkstraveler.org/2023/04/avian-influenza-confirmed-cause-three-condor-mortalities-arizona