 Alterations in the composition and function of the lung microbiome and mycobiome have been associated with an increasing number of chronic pulmonary diseases such as COPD, cystic fibrosis, chronic rhinosinusitis and asthma.While relatively rare in humans, aspergillosis is a common and dangerous infection in birds, particularly in pet parrots.Mallards and other ducks are particularly susceptible, as they often resort to poor food sources during bad weather.