Since 1975, Dr. Marshall has been attending to birds as a veterinarian. In 1988, he received his M.A.C.V.Sc. Degree in Avian Medicine. He is author of many books and videos and is regularly presents scientific papers at national and international veterinary conferences. His last presentation can be viewed in the budgerigar section. His latest book, “Eclectus Parrots as Pet and Aviary Birds� (ISBN 0-9750817-0-5), was published in 2004 by Australian Birdkeeper Publications.