Member Directory

David Trexler is a research scientist whose career has focused on dinosaurs and their environments. He and his family are known for major paleontological discoveries including Maiasaura peeblesorum. His current research focuses on comparisons between past and present climate and its effects on animal life.

David was born and raised in Montana. He spent his early years working in his family's rock shop where he learned rock, mineral, and fossil identification. Growing up along the Rocky Mountain Front, Dave learned firsthand the interactions between geologic, climatic, and biologic processes in a largely undisturbed environment. This background sparked an interest that has continued throughout his career. He always enjoyed sharing his love of rocks and fossils, and in 1985 began teaching field programs for the general public. In 1990, he began teaching college level courses in field paleontology and geology. Dave received dual undergraduate degrees in Biology and Earth Sciences in Montana, and a graduate degree in Vertebrate Paleontology in Alberta, Canada.

A driving force throughout his career has been providing participation in scientific research for the general public. Dave has conducted research and training throughout western North America. He has served as the staff paleontologist for several museums and currently works for the Two Medicine Dinosaur Center in Montana. Dave's research includes climate and climate change from a paleontological perspective. His work has identified long-term cycles that have a major impact on present day events. A portion of this work is explained in his book, "Becoming Dinosaurs: a Paleontologic Perspective on Climate Change Today."

Jack Gedney is a San Francisco Bay Area naturalist and educator who writes and teaches on birds, trees, and other aspects of California natural history. A Bay Area native, Jack studied natural history at U.C. Berkeley and now resides in Novato, CA, where he owns and operates Wild Birds Unlimited of Marin County. He writes a nature column for the Marin Independent Journal, leads public birding trips, and presents on various aspects of local nature.

J. Duane Sept is a biologist, professional free-lance nature photographer and writer. Duane’s award-winning photographs have been published internationally in books, magazines, newspapers, displays and others. He is the author of 24 natural history books including Common Mushrooms of the Northwest published by Calypso Publishing which is a best seller many times over! He is also the president of the Sunshine Coast Mycological Society in British Columbia.

Jeanne Murphy, a professional wildlife biologist is happiest when teaching about nature through educational workshops/eco-tours, capturing moments in time through nature photography or just exploring nature at leisure.

After pursuing a bachelor degree in animal science and graduate courses in ichthyology, Jeanne has since spent years traveling and mapping wetland and upland habitats throughout the United States as well as working as a government wildlife biologist educating the public about the importance of natural systems and their inhabitants.

Now, Jeanne excitedly co-owns Sensing Nature® (a Florida environmental education, ecotourism and educational nature products company) with her husband Brian Lane.

As a certified instructor for the University of Florida’s Florida Master Naturalist Program and as an active community member, Jeanne believes that we can all make a positive difference in tomorrow’s environmental successes.

Randi Boice has been behind the camera her whole life, but has only been photographing cannabis since 2014. While she lacks traditional schooling past high school, she is both a self-taught software engineer (named one of the top 18 female software engineers in San Francisco by Inc.) and self-taught photographer. Her passion lies in helping the underdog.

Since her diagnosis of Lyme disease in 2006, she has been using cannabis to treat its symptoms, having found that the side effects of the medication prescribed was worse than what it was meant to fix. Cannabis made it possible for her to live a somewhat normal life with chronic Lyme disease and she wanted to find a way to give back.

She goes by the mantra “See a need, fill a need” and she saw a need in helping to reverse the negative image around the cannabis plant that helped so many. She says she wanted to beautify what others saw as dirty, and help to turn the tide of propaganda in its favor. She has taken up the lens to give back, to show the world how she sees it.

Sean Moore is a photographer living in the Pacific Northwest. He first got started in the cannabis industry back in 2014 shortly after cannabis became recreationally legal in Washington State. Specializing in macro-photography, his main areas of focus in the cannabis industry are cataloging strains with top quality imagery.

Sean Moore’s cannabis and hash oil macro photography are featured across the country in multiple publications including CannabisNow,, Marijuana Venture, and Green Candy Press. When Sean isn’t shooting cannabis in the studio, he is out backpacking to photograph local wildflowers and scenery.

Dr. Hollingsworth is the Curator of Herpetology at the San Diego Natural History Museum and an Adjunct Professor at San Diego State University.

He has over 20 years of experience studying the amphibians and reptiles of the southwestern United States and northwestern México.

His field studies focus on the evolution and biodiversity of amphibians and reptiles found in deserts, high mountains, and on islands.

At the Museum, Dr. Hollingsworth curates the extensive natural history collections that help document the biodiversity of California and Baja California.

In addition, he has helped develop museum exhibitions, teaches classes, and has authored numerous publications regarding the amphibians and reptiles found in his region. In his spare time, he enjoys hiking and natural history photography.

George L. Heinrich is a field biologist and environmental educator specializing in Florida reptiles.

A graduate of Memphis State University, his research interests focus on anthropogenic threats to Florida’s non-marine turtles. His company, Heinrich Ecological Services, is based in St. Petersburg, Florida and conducts wildlife surveys and research, natural history programming, and nature-based tours.

George is an invited member of the IUCN Tortoise and Freshwater Turtle Specialist Group, served twice as co-chair of the Gopher Tortoise Council, and is the founding president of the Florida Turtle Conservation Trust.

He has worked for a number of years on the conservation of gopher tortoises and has studied the ecology and conservation needs of diamondback terrapins as part of a University of North Florida research team since 1995.

George has received a number of awards from state and regional NGOs for his conservation work, the most recent being the Golden LEEF Award for Outstanding Contribution to Florida Environmental Education from the League of Environmental Educators in Florida.

Timothy J. Walsh became actively involved in herpetology at the age of ten and has maintained an obsession ever since.

At age twelve, he was mentored by Dr. Jim Layne of Archbold Biological Station and was co-author of his first scientific publication at age 14. Tim went on to receive a degree in Zoo Animal Technology and has worked in the zoo, aquarium and museum field since 1992. He held the position of Senior Herpetologist with the Tennessee Aquarium and as Collection Manager with the Chelonian Research Institute and has been involved in a variety of research projects with such species as Carolina diamondback terrapins, spotted turtles and Suwannee cooters.

Tim has a Masters Degree in Museum Studies with research interests in conservation education, history of natural history, and reconnecting children and adults alike with nature. He is a member of the IUCN Tortoise and Freshwater Turtle Specialist Group, an avid outdoorsman, accomplished photographer, and book collector.