What illness can lead to weight loss as a symptom in hawks?

Weight loss can be a significant symptom of various illnesses in hawks, including Aspergillosis, Coccidiosis, and infections caused by tapeworms or roundworms. Each of these conditions affects the hawk's overall health, leading to a decline in body condition and weight.

Aspergillosis is a fungal infection that can cause respiratory distress in birds. When a hawk is unable to breathe properly, it may not feed adequately, resulting in weight loss.

Coccidiosis is caused by a protozoan parasite that affects the intestinal tract. This infection can lead to diarrhea and malabsorption of nutrients, both of which contribute to weight loss.

Infections from tapeworms or roundworms also impact a hawk’s health by directly competing for nutrients within the bird's digestive system. These parasitic infections can cause a decline in body condition leading to noticeable weight loss.

Since all these conditions can contribute to weight loss in hawks, the answer encompasses all options, making it correct to select the choice indicating that all of them may lead to weight loss.