Katie Holzer has been researching urban natural areas for eight years. Her goal is to increase understanding of natural area management to serve humans and other species. Her research focuses on designing and managing wetlands in cities to provide water filtering and flood control services, habitat for frogs and salamanders, and educational and recreational opportunities for people. She has worked as an environmental educator in Portland, Oregon, USA where she connected urban youth to their local habitats and started a citizen science amphibian monitoring program. Her dissertation research looks at habitat features associated with amphibian success in urban areas in Oregon, California, and Southeast Asia. A major focus of her dissertation is the role of invasive plant and animal species in these areas.