Parasites can affect birds tremendously and can come in many forms. Because parasite infestations can be critical, it's important to for bird owners to familiarize themselves with the most common parasites that infect birds and the symptoms that they cause. Knowing which signs of illness to look for can help you make sure that your pet receives prompt veterinary attention. Please visit http://birds.about.com/od/birdhealth/a/parasites.htm for more information.