Category Archives: Speakers

iNaturalist and Getting Children Involved in Nature

Craig Hensley Craig is the Texas Nature Trackers Biologist with the TPWD Wildlife Diversity Team. He holds a Master’s Degree in Zoology and B.S. in Fisheries and Wildlife Management and is a federally-licensed bird bander. A native of Iowa, he has been a naturalist and interpreter for more than 30 years, from Minnesota to Texas. Craig has had a life-long love affair with the natural world but his newest passions, however, relate to his four beautiful (of course) granddaughters.    

Agriculture and Natural Resources

Sam Womble County Extension Agent – Agriculture and Natural Resources Bexar County Bachelors degree from Texas A&M in Animal Science Masters degree from Tarleton State University in Agricultural Education Employed with Texas A&M AgriLife Extension since 1998. Served Erath, Victoria and Bandera counties prior to moving to Bexar County in November 2015. Responsibilities include providing leadership and support to the adult ag program in addition to supporting youth livestock project work.


Dr. Clark Wernecke Project Director of the Prehistory Research Project at the University of Texas at Austin and Executive Director of the Gault School of Archaeological Research, San Marcos, TX Clark Wernecke received an MBA from Northwestern University, an M.A. in Anthropology from Florida Atlantic and a Ph.D. from the University of Texas at Austin. With a strong background in business, he has specialized in the management of large archaeological projects. He is currently researching the history of the famous Gault site in Bell County and is the… Read More →

Urban Forestry, Forest Ecology and Management

Mark Kroeze Urban Forester, Texas A&M Forest Service, San Antonio, TX Mark is a graduate of the University of Minnesota. He is a certified forester, certified arborist and Municipal Specialist and graduate of the Municipal Foresters Institute. He is responsible for working with municipalities and their urban forestry programs from San Antonio to the Rio Grande Valley.   Lissa Martinez Lissa Martinez has been interested in Urban Forestry in the San Antonio area since the great floods of 1998 and 2003, and began her involvement by attending the… Read More →

Interpretation, Volunteers as Teachers

Liz Palfini Park Superintendent, Palmetto State Park, Texas Parks and Wildlife Department, Gonzales, TX Liz holds a Bachelors degree in Ornamental Horticulture from New Mexico State University and a Masters degree in Botany and Education from the University of Florida. Liz is an active member of the National Association for Interpretation and a Certified Interpretive Trainer. She has been working as a front line interpreter for over 15 years.  

Plants, The Nature of Naming, Citizen Science

Cheryl Hamilton Citizen Scientist, San Antonio, TX Cheryl has been an Alamo Area Master Naturalist since November 2007 and is also a member of the San Antonio chapter of the Native Plant Society of Texas. Cheryl co-founded the Balcones Chapter of the Invaders of Texas Program in 2010 and passed on the leadership to George Ozuna and Olivia Tapia in 2016. The Balcones Chapter and Salsa Squad volunteers have contributed more than 10,000 volunteer hours to eradicate more than 100,000 invasive plants. Cheryl has presented 70+ invasive/native plant… Read More →

Fish, Ichthyology

John Prentice Retired Fishery Research Biologist, Texas Parks and Wildlife Department. John holds degrees in aquatic and marine biology and fisheries management. After completing his education, he began work with Texas Parks and Wildlife and led many projects related to conservation of aquatic resources. In retirement, he enjoys working with the Texas Master Naturalist to continue aquatic conservation efforts.  

Wildscaping & Urban Systems

Judit Green Urban Biologist, Texas Parks and Wildlife, San Antonio, TX One of two urban biologists in the San Antonio area. She and others created the Texas Master Naturalist program and developed the initial curriculum for the program.

Weather and Climate

Jon W. Zeitler Science and Operations Officer National Weather Service (NWS) New Braunfels, Texas Jon holds a B.S. degree in meteorology from Iowa State University and a Masters degree in meteorology from Texas A&M University. He previously served in NWS positions at Houston-Galveston, Texas, Rapid City, South Dakota and College Station, Texas Before joining the NWS, Jon was a climatologist at The Southeast Regional Climate Center in Columbia, South Carolina, The Texas State Climatologist’s Office at Texas A&M University and The Agricultural Extension Service at Iowa State University.  He… Read More →

Insects, Entomology

Molly Keck Integrated Pest Management Program Specialist, Texas AgriLife Extension, Bexar County, San Antonio, TX. Molly holds a Bachelors and Masters degree in Entomology. She has worked for the Extension Service since 2005 providing youth entomology programs, Master Gardener trainings, CEU courses for pest control operators and other educational outreach programs to the public. In addition, she performs various research programs on fire ants and other urban pests.