Psittacine beak and feather disease (PBFD), or avian AIDS, is one of the most dangerous common diseases among birds. PBFD is caused by a virus that targets parrot’s beaks and feathers and then attacks their immune systems. In 1975, the PBFD virus was discovered following an investigation into the deaths of thousands of Australian cockatoos. … Continue reading PBFD disease in birds and parrots, symptoms of the disease