H5N1 avian flu strikes condors in Arizona; more detections reported in pet cats Lisa Schnirring Avian Influenza (Bird Flu) Wendy Miller/Flickr cc Share The National Park Service (NPS) reported that tests have confirmed H5N1 avian flu in endangered condors in the Arizona-Utah flock, with deaths reported and sick birds collected for care and monitoring. In an April 7 statement, the NPS said the virus has been linked to three deaths so far.