A federal permit is required to keep birds of prey for falconry. E. Disease and parasitism. Diurnal birds of prey are exposed to a variety of bacterial, viral, and fungal diseases, as well as internal and external parasites from the prey they eat. Though not usually fatal, infections may make a bird weak and vulnerable to other environmental factors. Young nestlings and subadults are the most susceptible to starvation.
Smaller nestlings are often unable to compete with their siblings for food.
Subadults are inexperienced at catching their own food and, if the species is territorial, they must quickly establish a territory to hunt. Inc. All Rights Reserved.