Herpetology is not a Degree field, it is considered in the academic field to be a sub-section of biology.
No, a degree is not necessary to be considered a herpetologist, some of the world leading authorities that are classified herpetologist never attended a formal college or university. Their knowledge and respect comes from hands on studies and working with reptiles.
Some considered leaders in their fields, have degrees in other fields or are employed in other ones.
Peter Rankin, one of Australia's most respected herpetologist was called that when he was a just a very young student in primary school. When 12 he was considered an authority in reptiles, not only a member of the Australian Herpetological Society for over eight years, but also their secretary during his regular school years, at 16 he was employed at the Australian Museum for the summer and worked in the herpetology department part time after that. At the time of his death, he had just completed a BA in science degree(2 year) at Macquarie University. Two spieces are named after him by Dr Glen Storr a gecko {Diplodactylus rankini), and Mr Ross Sadlier named a skink (Nannoscincus rankini). Skinks were the area that Peter was most intested in at the time and planning on pursuing. Pogona Hernrylawsoni was commonly called Rankin dragons in his honor, prior to its offical name given.(an official name can not be the common name used)
Other that are not degreed:
The leading authorities on Mexican herpetology is a pharmaceuticals salesman in Louisiana.
The leading authority on Kansas reptiles is a retired man and never finished college or studied in the field he is acknowledged as a herpetologist in.
One of the world's authorities on the breeding biology of pythons is a young man in Oklahoma and he certainly qualifies as a herpetologist without a formal education or degree
Education is a good way to acquire knowledge in a field you are interested in, but not the only way as those above had proved, a desire to study, collect and keep them and learn from them, make careful observations, read a lot, and talked to others at professional meetings is also a way to accomplish this. Joining a herp society is a good way to start and also using online resources.
You can also take special courses offered at universities, I know that Elliott Jacobson has a really good course in herpetology at the University of Florida in Gainesville.
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