What are some common symptoms of a raptor suffering from Aspergillosis?

Respiratory distress and coughing are key symptoms associated with Aspergillosis in raptors. This fungal infection primarily affects the lungs and air sacs of birds, leading to inflammation and difficulty in breathing. The fungus responsible, Aspergillus, thrives in environments with high organic matter and can be inhaled by the birds, particularly in captivity where environmental management is crucial. As the disease progresses, birds may exhibit coughing due to irritation in their respiratory system. This symptom is particularly concerning as it directly impacts the bird's ability to breathe efficiently and can severely affect overall health.

The other options, while they may be symptoms related to various health issues, do not specifically correlate with Aspergillosis. Excessive feather loss can be linked to a range of factors including molting or parasitic infections, sudden weight gain may indicate other health problems, and increased aggression is not a recognized symptom of this particular fungal infection. Understanding the specific signs of Aspergillosis is vital for timely diagnosis and treatment in raptors.