2024 program Instructors

Sam Nelson is the youth programs forester for Casey Trees, aka an educational arborist. He was an elementary school teacher for years before turning toward urban forestry. He currently designs and implements tree plans at schools in the capital region but more importantly gets students and teachers involved to help build and sustain their relationships with trees, plants, and local ecologies. In addition, he’s passionate about fusing the arts with life sciences. He is a Master Naturalist ’20 and earned his master’s from University of Utah’s Environmental Humanities graduate program. But mostly he learns from plants themselves.

Serenella Linares is the Puerto Rican Facility Director in charge of managing Mount Rainier Nature Center (MRNC). She is dedicated to sparking curiosity about nature and inspiring nature stewardship through high-quality environmental education experiences for people of all ages. In her role as Facility Director at MRNC she has organized programs and special events to bring the community of Mount Rainier back to the Nature Center after the pandemic with in-person events and online workshops. Ms. Linares is also spearheading restoration efforts to increase the natural areas in the property, attract a wider variety of wildlife, create natural areas that better the resident’s sense of wellbeing, and to demonstrate sustainability practices to the local community. Serenella is known around the greater DC area for being expert in two things: making learning fun (for children and adults) and mycology (mushroom knowledge). With her program “Ask a Fun-Gal” she established a collaboration between Mount Rainier Nature Center and the Mycological Association of Washington DC to bring the DNA research experiments to the center and open the door for the public to know more about mycology. She also received the Environmental Educator award from Nature Forward in January 2024, for her endless innovation and dedication to environmental education to spark a love of nature in people of all ages and backgrounds. As former Director of Adult Education at Nature Forward (formerly known as Audubon Naturalist Society) and former Co-founding Co-Chair of Naturally Latinos, Serenella Linares worked with Nature forward since 2015 and was promoted to Adult Education Director on 2021. Through the Naturalist Hour, Natural History Field Studies, and Master Naturalist programs, Serenella used the virtual world as an introductory door into the fascinating aspects of nature and a catalyst for people to get inspired to learn more. Through her nature walks and master naturalist trainings, Ms. Linares encouraged her participants to be curious about nature and to incorporate different perspectives into their learning process. In response to the COVID-19 pandemic, Ms. Linares developed a virtual programs and bilingual videos as educational tools for both English and Spanish speakers. Serenella was a crucial component to the shift from strictly in-person programing to the safer on-line interactions that have now expanded the audiences able to participate in the programs, as well as during the Naturally Latinos Conference and post-conference programming. Her previous work at Nature Forward includes collaborating with schools to deliver curriculum-based and NGSS aligned environmental education programs, establishing fieldtrip scholarships for title one schools and Spanish speaking children, and teaching nature-themed summer camps. Prior to joining Nature Forward, Ms. Linares worked as a Park Naturalist with the Prince George’s County Department of Parks and Recreation from 2011-2016 at Mount Rainier Nature and Recreation Center. Serenella holds a Bachelor’s degree in biology from Universidad Metropolitana de Puerto Rico, a Master’s degree in atmospheric science from Howard University, and 7 years of training in mycology from University of Maryland. Ms. Linares time outside of work is invested towards being an active member of the DNA research committee for the Mycological Association of Washington DC, exploring natural areas, nature photography, and participating in community (citizen) science projects.

Zach Slavin is an avid birdwatcher and board member and former president of DC Audubon Society. He has been living and birding in DC for over a decade and loves birding in our many national parks as well as around his neighborhood in Columbia Heights. Zach spent nine years working at National Audubon Society in their science and education departments where he worked on engaging individuals in collecting meaningful data on birds through community science projects such as the Great Backyard Bird Count, Christmas Bird Count, as well as their latest program, Climate Watch. Zach currently works in the restaurant industry and remains active in conservation and birdwatching through volunteering with local nonprofits. 

Liz Crafford is a geologist by training, and after earning her PhD from UC Berkeley in the early 1990's she worked in mineral exploration and academia in Nevada and Alaska. Currently she works as a consultant with the Smithsonian's Global Volcanism Program recording data from volcanic eruptions from around the world. While working at home during the pandemic, she came to recognize the extent of the invasive plant problem in nearby Rock Creek Park. She became a permitted Rock Creek Weed warrior, and then started a local steward group, the Shepherd Park Weed Warriors, to care for DPR land in her neighborhood. In addition, she advocates with others for better protections for natural areas within DC. In spring 2023 she participated in the DC Master Naturalist program, and is now enjoying volunteering in that capacity to teach others about invasive plant removal and the importance of restoring native habitats to the natural areas all around us.

John Burke joined the Fairfax County Stormwater Management as an Ecologist in 2013 and has served since 2020 as Fairfax County Park Authority’s Natural Resources Branch Manager. He has served as an aquatic taxonomist, managing Fairfax County’s enhanced extended detention ponds, and working to bring County stormwater facilities up to environmental standards. John has been promoting environmental stewardship through outreach, education, and industrial environmental compliance in Virginia for over 10 years. Previous employers include the City of Alexandria and The Wildlife Ecotoxicology and Physiological Ecology Lab at Virginia Tech. He has conducted research in the fields of aquatic ecotoxicology and fisheries science and has a B.S. degree in Fisheries Science from Virginia Tech.

Jennie Hudson is a River Restoration Associate at the Anacostia Watershed Society in Bladensburg, MD. She conducts ecological restoration on the Anacostia River watershed (in both DC and MD), including wetland restoration, tree plantings, mussel propagation, wildlife monitoring, invasive plant management, and GIS analysis. Previously she spent 6 months working by the Gulf of Mexico in Florida to conduct different biological surveys including mangroves and sea turtles. Jennie recently graduated with a Bachelor's degree in Environmental Science from Stevenson University in Owings Mills, MD. 

Ana Leilani Ka’ahanui is co-founder of the DC metro area nonprofit Capital Nature. Her organization’s mission is to connect the people and visitors of the DC area to the abundance of nature in the region. She is a forest bathing guide through the Association of Nature and Forest Therapy Guides and Programs and is devoted to sharing the practice, needed now more than ever. Ana is also a Virginia Master Naturalist and committed to connecting people to nature through citizen science and other biodiversity initiatives such as the global City Nature Challenge. She enjoys engaging others in citizen science by leading nature walks and teaching about the app iNaturalist.

Stella Tarnay is co-founder and executive director of Capital Nature. In her role she leads Capital Nature's engagement efforts with local communities, and co-creates programs with Ana. Capital Nature is a DC-area non-profit with a mission to bring nature into metro area residents' lives. We conduct nature walks and nature immersion experiences, lead citizen science explorations, and host virtual programs on local nature. Capital Nature is a lead organizer of the annual City Nature Challenge, and a facilitator of the Washington DC Area Citizen Science Network. Prior toCapital Nature, Stella was a convener of the Biophilic DC civic initiative, and a green building policymaker. When she is not working on nature engagement, Stella is an art lover, and an explorer of Rock Creek Park. Stella is a graduate of the Arlington Regional Master Naturalists program.